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Finding the Fourth Proportional to 18,679,459.60, 28,019,189.40 and 12,296,918.80

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Solution

The fourth proportional to 18,679,459.60, 28,019,189.40 and 12,296,918.80 is: 18,445,378.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,679,459.60 : 28,019,189.40 = 12,296,918.80 : x
  2. Step 2: Convert to fraction form
    18,679,459.60/28,019,189.40 = 12,296,918.80/x
  3. Step 3: Cross multiply
    18,679,459.60x = 28,019,189.40 × 12,296,918.80
  4. Step 4: Simplify right side
    18,679,459.60x = 344,549,696,893,620.75
  5. Step 5: Solve for x
    x = 344,549,696,893,620.75/18,679,459.60
  6. Step 6: Final answer
    x = 18,445,378.20

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.