Home / 21,127.92-29,151-12,738.48

Finding the Fourth Proportional to 21,127.92, 29,151 and 12,738.48

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Solution

The fourth proportional to 21,127.92, 29,151 and 12,738.48 is: 17,575.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,127.92 : 29,151 = 12,738.48 : x
  2. Step 2: Convert to fraction form
    21,127.92/29,151 = 12,738.48/x
  3. Step 3: Cross multiply
    21,127.92x = 29,151 × 12,738.48
  4. Step 4: Simplify right side
    21,127.92x = 371,339,430.48
  5. Step 5: Solve for x
    x = 371,339,430.48/21,127.92
  6. Step 6: Final answer
    x = 17,575.77

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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.