Home / 20,642.11-28,497.92-13,589.03

Finding the Fourth Proportional to 20,642.11, 28,497.92 and 13,589.03

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Solution

The fourth proportional to 20,642.11, 28,497.92 and 13,589.03 is: 18,760.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,642.11 : 28,497.92 = 13,589.03 : x
  2. Step 2: Convert to fraction form
    20,642.11/28,497.92 = 13,589.03/x
  3. Step 3: Cross multiply
    20,642.11x = 28,497.92 × 13,589.03
  4. Step 4: Simplify right side
    20,642.11x = 387,259,089.82
  5. Step 5: Solve for x
    x = 387,259,089.82/20,642.11
  6. Step 6: Final answer
    x = 18,760.63

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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.