Home / 15,530.50-21,431.88-8,456.92

Finding the Fourth Proportional to 15,530.50, 21,431.88 and 8,456.92

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Solution

The fourth proportional to 15,530.50, 21,431.88 and 8,456.92 is: 11,670.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,530.50 : 21,431.88 = 8,456.92 : x
  2. Step 2: Convert to fraction form
    15,530.50/21,431.88 = 8,456.92/x
  3. Step 3: Cross multiply
    15,530.50x = 21,431.88 × 8,456.92
  4. Step 4: Simplify right side
    15,530.50x = 181,247,694.61
  5. Step 5: Solve for x
    x = 181,247,694.61/15,530.50
  6. Step 6: Final answer
    x = 11,670.44

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Half scale
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Double scale
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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.