Home / 21,615.24-29,819.60-13,543.92

Finding the Fourth Proportional to 21,615.24, 29,819.60 and 13,543.92

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Solution

The fourth proportional to 21,615.24, 29,819.60 and 13,543.92 is: 18,684.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,615.24 : 29,819.60 = 13,543.92 : x
  2. Step 2: Convert to fraction form
    21,615.24/29,819.60 = 13,543.92/x
  3. Step 3: Cross multiply
    21,615.24x = 29,819.60 × 13,543.92
  4. Step 4: Simplify right side
    21,615.24x = 403,874,276.83
  5. Step 5: Solve for x
    x = 403,874,276.83/21,615.24
  6. Step 6: Final answer
    x = 18,684.70

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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.