Home / 21,287,640.20-31,894,718.70-9,904,742.60

Finding the Fourth Proportional to 21,287,640.20, 31,894,718.70 and 9,904,742.60

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Solution

The fourth proportional to 21,287,640.20, 31,894,718.70 and 9,904,742.60 is: 14,840,018.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,287,640.20 : 31,894,718.70 = 9,904,742.60 : x
  2. Step 2: Convert to fraction form
    21,287,640.20/31,894,718.70 = 9,904,742.60/x
  3. Step 3: Cross multiply
    21,287,640.20x = 31,894,718.70 × 9,904,742.60
  4. Step 4: Simplify right side
    21,287,640.20x = 315,908,979,022,906.62
  5. Step 5: Solve for x
    x = 315,908,979,022,906.62/21,287,640.20
  6. Step 6: Final answer
    x = 14,840,018.72

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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.