Home / 20,996.19-31,478.65-9,147.71

Finding the Fourth Proportional to 20,996.19, 31,478.65 and 9,147.71

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Solution

The fourth proportional to 20,996.19, 31,478.65 and 9,147.71 is: 13,714.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,996.19 : 31,478.65 = 9,147.71 : x
  2. Step 2: Convert to fraction form
    20,996.19/31,478.65 = 9,147.71/x
  3. Step 3: Cross multiply
    20,996.19x = 31,478.65 × 9,147.71
  4. Step 4: Simplify right side
    20,996.19x = 287,957,617.22
  5. Step 5: Solve for x
    x = 287,957,617.22/20,996.19
  6. Step 6: Final answer
    x = 13,714.76

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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.