Home / 21,554.92-29,760.42-15,890.32

Finding the Fourth Proportional to 21,554.92, 29,760.42 and 15,890.32

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Solution

The fourth proportional to 21,554.92, 29,760.42 and 15,890.32 is: 21,939.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,554.92 : 29,760.42 = 15,890.32 : x
  2. Step 2: Convert to fraction form
    21,554.92/29,760.42 = 15,890.32/x
  3. Step 3: Cross multiply
    21,554.92x = 29,760.42 × 15,890.32
  4. Step 4: Simplify right side
    21,554.92x = 472,902,597.13
  5. Step 5: Solve for x
    x = 472,902,597.13/21,554.92
  6. Step 6: Final answer
    x = 21,939.43

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Double scale
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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.