Home / 22,515.18-31,042.08-15,429.30

Finding the Fourth Proportional to 22,515.18, 31,042.08 and 15,429.30

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Solution

The fourth proportional to 22,515.18, 31,042.08 and 15,429.30 is: 21,272.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,515.18 : 31,042.08 = 15,429.30 : x
  2. Step 2: Convert to fraction form
    22,515.18/31,042.08 = 15,429.30/x
  3. Step 3: Cross multiply
    22,515.18x = 31,042.08 × 15,429.30
  4. Step 4: Simplify right side
    22,515.18x = 478,957,564.94
  5. Step 5: Solve for x
    x = 478,957,564.94/22,515.18
  6. Step 6: Final answer
    x = 21,272.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.