Home / 20,531.36-28,327.92-12,144.08

Finding the Fourth Proportional to 20,531.36, 28,327.92 and 12,144.08

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Solution

The fourth proportional to 20,531.36, 28,327.92 and 12,144.08 is: 16,755.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,531.36 : 28,327.92 = 12,144.08 : x
  2. Step 2: Convert to fraction form
    20,531.36/28,327.92 = 12,144.08/x
  3. Step 3: Cross multiply
    20,531.36x = 28,327.92 × 12,144.08
  4. Step 4: Simplify right side
    20,531.36x = 344,016,526.71
  5. Step 5: Solve for x
    x = 344,016,526.71/20,531.36
  6. Step 6: Final answer
    x = 16,755.66

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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.