Home / 22,715.78-31,356.33-13,287.38

Finding the Fourth Proportional to 22,715.78, 31,356.33 and 13,287.38

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Solution

The fourth proportional to 22,715.78, 31,356.33 and 13,287.38 is: 18,341.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,715.78 : 31,356.33 = 13,287.38 : x
  2. Step 2: Convert to fraction form
    22,715.78/31,356.33 = 13,287.38/x
  3. Step 3: Cross multiply
    22,715.78x = 31,356.33 × 13,287.38
  4. Step 4: Simplify right side
    22,715.78x = 416,643,472.12
  5. Step 5: Solve for x
    x = 416,643,472.12/22,715.78
  6. Step 6: Final answer
    x = 18,341.59

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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.