Home / 20,718.26-28,591.89-11,287.70

Finding the Fourth Proportional to 20,718.26, 28,591.89 and 11,287.70

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Solution

The fourth proportional to 20,718.26, 28,591.89 and 11,287.70 is: 15,577.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.26 : 28,591.89 = 11,287.70 : x
  2. Step 2: Convert to fraction form
    20,718.26/28,591.89 = 11,287.70/x
  3. Step 3: Cross multiply
    20,718.26x = 28,591.89 × 11,287.70
  4. Step 4: Simplify right side
    20,718.26x = 322,736,676.75
  5. Step 5: Solve for x
    x = 322,736,676.75/20,718.26
  6. Step 6: Final answer
    x = 15,577.40

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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.