Home / 20,642.95-28,499.09-13,589.88

Finding the Fourth Proportional to 20,642.95, 28,499.09 and 13,589.88

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Solution

The fourth proportional to 20,642.95, 28,499.09 and 13,589.88 is: 18,761.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,642.95 : 28,499.09 = 13,589.88 : x
  2. Step 2: Convert to fraction form
    20,642.95/28,499.09 = 13,589.88/x
  3. Step 3: Cross multiply
    20,642.95x = 28,499.09 × 13,589.88
  4. Step 4: Simplify right side
    20,642.95x = 387,299,213.21
  5. Step 5: Solve for x
    x = 387,299,213.21/20,642.95
  6. Step 6: Final answer
    x = 18,761.82

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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.