Home / 20,988.72-31,488.52-9,299.16

Finding the Fourth Proportional to 20,988.72, 31,488.52 and 9,299.16

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Solution

The fourth proportional to 20,988.72, 31,488.52 and 9,299.16 is: 13,951.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,988.72 : 31,488.52 = 9,299.16 : x
  2. Step 2: Convert to fraction form
    20,988.72/31,488.52 = 9,299.16/x
  3. Step 3: Cross multiply
    20,988.72x = 31,488.52 × 9,299.16
  4. Step 4: Simplify right side
    20,988.72x = 292,816,785.64
  5. Step 5: Solve for x
    x = 292,816,785.64/20,988.72
  6. Step 6: Final answer
    x = 13,951.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.