Home / 20,755.16-28,642.10-11,323.72

Finding the Fourth Proportional to 20,755.16, 28,642.10 and 11,323.72

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Solution

The fourth proportional to 20,755.16, 28,642.10 and 11,323.72 is: 15,626.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,755.16 : 28,642.10 = 11,323.72 : x
  2. Step 2: Convert to fraction form
    20,755.16/28,642.10 = 11,323.72/x
  3. Step 3: Cross multiply
    20,755.16x = 28,642.10 × 11,323.72
  4. Step 4: Simplify right side
    20,755.16x = 324,335,120.61
  5. Step 5: Solve for x
    x = 324,335,120.61/20,755.16
  6. Step 6: Final answer
    x = 15,626.72

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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.