Home / 20,711.88-28,557.66-16,921.08

Finding the Fourth Proportional to 20,711.88, 28,557.66 and 16,921.08

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Solution

The fourth proportional to 20,711.88, 28,557.66 and 16,921.08 is: 23,330.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,711.88 : 28,557.66 = 16,921.08 : x
  2. Step 2: Convert to fraction form
    20,711.88/28,557.66 = 16,921.08/x
  3. Step 3: Cross multiply
    20,711.88x = 28,557.66 × 16,921.08
  4. Step 4: Simplify right side
    20,711.88x = 483,226,449.47
  5. Step 5: Solve for x
    x = 483,226,449.47/20,711.88
  6. Step 6: Final answer
    x = 23,330.88

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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.