Home / 21,620.60-29,838.24-12,191.12

Finding the Fourth Proportional to 21,620.60, 29,838.24 and 12,191.12

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Solution

The fourth proportional to 21,620.60, 29,838.24 and 12,191.12 is: 16,824.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,620.60 : 29,838.24 = 12,191.12 : x
  2. Step 2: Convert to fraction form
    21,620.60/29,838.24 = 12,191.12/x
  3. Step 3: Cross multiply
    21,620.60x = 29,838.24 × 12,191.12
  4. Step 4: Simplify right side
    21,620.60x = 363,761,564.43
  5. Step 5: Solve for x
    x = 363,761,564.43/21,620.60
  6. Step 6: Final answer
    x = 16,824.77

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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.