Home / 20,411.91-28,167.66-11,459.88

Finding the Fourth Proportional to 20,411.91, 28,167.66 and 11,459.88

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Solution

The fourth proportional to 20,411.91, 28,167.66 and 11,459.88 is: 15,814.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,411.91 : 28,167.66 = 11,459.88 : x
  2. Step 2: Convert to fraction form
    20,411.91/28,167.66 = 11,459.88/x
  3. Step 3: Cross multiply
    20,411.91x = 28,167.66 × 11,459.88
  4. Step 4: Simplify right side
    20,411.91x = 322,798,003.48
  5. Step 5: Solve for x
    x = 322,798,003.48/20,411.91
  6. Step 6: Final answer
    x = 15,814.20

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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.