Home / 20,382.72-28,134.12-13,310.22

Finding the Fourth Proportional to 20,382.72, 28,134.12 and 13,310.22

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Solution

The fourth proportional to 20,382.72, 28,134.12 and 13,310.22 is: 18,372.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,382.72 : 28,134.12 = 13,310.22 : x
  2. Step 2: Convert to fraction form
    20,382.72/28,134.12 = 13,310.22/x
  3. Step 3: Cross multiply
    20,382.72x = 28,134.12 × 13,310.22
  4. Step 4: Simplify right side
    20,382.72x = 374,471,326.71
  5. Step 5: Solve for x
    x = 374,471,326.71/20,382.72
  6. Step 6: Final answer
    x = 18,372.00

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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.