Home / 15,231.48-21,020.16-8,517.20

Finding the Fourth Proportional to 15,231.48, 21,020.16 and 8,517.20

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Solution

The fourth proportional to 15,231.48, 21,020.16 and 8,517.20 is: 11,754.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,231.48 : 21,020.16 = 8,517.20 : x
  2. Step 2: Convert to fraction form
    15,231.48/21,020.16 = 8,517.20/x
  3. Step 3: Cross multiply
    15,231.48x = 21,020.16 × 8,517.20
  4. Step 4: Simplify right side
    15,231.48x = 179,032,906.75
  5. Step 5: Solve for x
    x = 179,032,906.75/15,231.48
  6. Step 6: Final answer
    x = 11,754.14

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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.