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Finding the Fourth Proportional to 18,795,343.20, 28,172,019.60 and 10,712,191.20

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Solution

The fourth proportional to 18,795,343.20, 28,172,019.60 and 10,712,191.20 is: 16,056,320.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,795,343.20 : 28,172,019.60 = 10,712,191.20 : x
  2. Step 2: Convert to fraction form
    18,795,343.20/28,172,019.60 = 10,712,191.20/x
  3. Step 3: Cross multiply
    18,795,343.20x = 28,172,019.60 × 10,712,191.20
  4. Step 4: Simplify right side
    18,795,343.20x = 301,784,060,445,347.50
  5. Step 5: Solve for x
    x = 301,784,060,445,347.50/18,795,343.20
  6. Step 6: Final answer
    x = 16,056,320.83

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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.