Home / 21,507.47-29,691.11-13,445.61

Finding the Fourth Proportional to 21,507.47, 29,691.11 and 13,445.61

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Solution

The fourth proportional to 21,507.47, 29,691.11 and 13,445.61 is: 18,561.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,507.47 : 29,691.11 = 13,445.61 : x
  2. Step 2: Convert to fraction form
    21,507.47/29,691.11 = 13,445.61/x
  3. Step 3: Cross multiply
    21,507.47x = 29,691.11 × 13,445.61
  4. Step 4: Simplify right side
    21,507.47x = 399,214,973.92
  5. Step 5: Solve for x
    x = 399,214,973.92/21,507.47
  6. Step 6: Final answer
    x = 18,561.69

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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.