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Finding the Fourth Proportional to 21,409.92, 29,543.88 and 12,332.88

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Solution

The fourth proportional to 21,409.92, 29,543.88 and 12,332.88 is: 17,018.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,409.92 : 29,543.88 = 12,332.88 : x
  2. Step 2: Convert to fraction form
    21,409.92/29,543.88 = 12,332.88/x
  3. Step 3: Cross multiply
    21,409.92x = 29,543.88 × 12,332.88
  4. Step 4: Simplify right side
    21,409.92x = 364,361,126.77
  5. Step 5: Solve for x
    x = 364,361,126.77/21,409.92
  6. Step 6: Final answer
    x = 17,018.33

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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.