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Finding the Fourth Proportional to 18,679,487.10, 28,019,230.65 and 12,296,946.30

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Solution

The fourth proportional to 18,679,487.10, 28,019,230.65 and 12,296,946.30 is: 18,445,419.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,679,487.10 : 28,019,230.65 = 12,296,946.30 : x
  2. Step 2: Convert to fraction form
    18,679,487.10/28,019,230.65 = 12,296,946.30/x
  3. Step 3: Cross multiply
    18,679,487.10x = 28,019,230.65 × 12,296,946.30
  4. Step 4: Simplify right side
    18,679,487.10x = 344,550,974,670,364.12
  5. Step 5: Solve for x
    x = 344,550,974,670,364.12/18,679,487.10
  6. Step 6: Final answer
    x = 18,445,419.45

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Double scale
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Similar ratio
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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.