Home / 20,781,680.10-31,119,376.05-15,360,981.90

Finding the Fourth Proportional to 20,781,680.10, 31,119,376.05 and 15,360,981.90

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Solution

The fourth proportional to 20,781,680.10, 31,119,376.05 and 15,360,981.90 is: 23,002,190.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781,680.10 : 31,119,376.05 = 15,360,981.90 : x
  2. Step 2: Convert to fraction form
    20,781,680.10/31,119,376.05 = 15,360,981.90/x
  3. Step 3: Cross multiply
    20,781,680.10x = 31,119,376.05 × 15,360,981.90
  4. Step 4: Simplify right side
    20,781,680.10x = 478,024,172,243,343.50
  5. Step 5: Solve for x
    x = 478,024,172,243,343.50/20,781,680.10
  6. Step 6: Final answer
    x = 23,002,190.87

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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.