Home / 21,409.59-29,545.26-11,978.16

Finding the Fourth Proportional to 21,409.59, 29,545.26 and 11,978.16

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Solution

The fourth proportional to 21,409.59, 29,545.26 and 11,978.16 is: 16,529.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,409.59 : 29,545.26 = 11,978.16 : x
  2. Step 2: Convert to fraction form
    21,409.59/29,545.26 = 11,978.16/x
  3. Step 3: Cross multiply
    21,409.59x = 29,545.26 × 11,978.16
  4. Step 4: Simplify right side
    21,409.59x = 353,897,851.52
  5. Step 5: Solve for x
    x = 353,897,851.52/21,409.59
  6. Step 6: Final answer
    x = 16,529.88

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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.