Home / 15,520.48-21,417.12-9,231.68

Finding the Fourth Proportional to 15,520.48, 21,417.12 and 9,231.68

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Solution

The fourth proportional to 15,520.48, 21,417.12 and 9,231.68 is: 12,739.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,520.48 : 21,417.12 = 9,231.68 : x
  2. Step 2: Convert to fraction form
    15,520.48/21,417.12 = 9,231.68/x
  3. Step 3: Cross multiply
    15,520.48x = 21,417.12 × 9,231.68
  4. Step 4: Simplify right side
    15,520.48x = 197,715,998.36
  5. Step 5: Solve for x
    x = 197,715,998.36/15,520.48
  6. Step 6: Final answer
    x = 12,739.04

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Double scale
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Similar ratio
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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.