Home / 20,589.59-28,412.88-11,157.95

Finding the Fourth Proportional to 20,589.59, 28,412.88 and 11,157.95

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Solution

The fourth proportional to 20,589.59, 28,412.88 and 11,157.95 is: 15,397.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,589.59 : 28,412.88 = 11,157.95 : x
  2. Step 2: Convert to fraction form
    20,589.59/28,412.88 = 11,157.95/x
  3. Step 3: Cross multiply
    20,589.59x = 28,412.88 × 11,157.95
  4. Step 4: Simplify right side
    20,589.59x = 317,029,523.59
  5. Step 5: Solve for x
    x = 317,029,523.59/20,589.59
  6. Step 6: Final answer
    x = 15,397.56

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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.