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Finding the Fourth Proportional to 15,171.54, 20,934.96 and 9,121.10

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Solution

The fourth proportional to 15,171.54, 20,934.96 and 9,121.10 is: 12,586.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,171.54 : 20,934.96 = 9,121.10 : x
  2. Step 2: Convert to fraction form
    15,171.54/20,934.96 = 9,121.10/x
  3. Step 3: Cross multiply
    15,171.54x = 20,934.96 × 9,121.10
  4. Step 4: Simplify right side
    15,171.54x = 190,949,863.66
  5. Step 5: Solve for x
    x = 190,949,863.66/15,171.54
  6. Step 6: Final answer
    x = 12,586.06

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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.