Home / 20,717.28-28,589.86-11,285.88

Finding the Fourth Proportional to 20,717.28, 28,589.86 and 11,285.88

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Solution

The fourth proportional to 20,717.28, 28,589.86 and 11,285.88 is: 15,574.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,717.28 : 28,589.86 = 11,285.88 : x
  2. Step 2: Convert to fraction form
    20,717.28/28,589.86 = 11,285.88/x
  3. Step 3: Cross multiply
    20,717.28x = 28,589.86 × 11,285.88
  4. Step 4: Simplify right side
    20,717.28x = 322,661,729.18
  5. Step 5: Solve for x
    x = 322,661,729.18/20,717.28
  6. Step 6: Final answer
    x = 15,574.52

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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.