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Finding the Fourth Proportional to 12,521.70, 17,279.10 and 7,216.92

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Solution

The fourth proportional to 12,521.70, 17,279.10 and 7,216.92 is: 9,958.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,521.70 : 17,279.10 = 7,216.92 : x
  2. Step 2: Convert to fraction form
    12,521.70/17,279.10 = 7,216.92/x
  3. Step 3: Cross multiply
    12,521.70x = 17,279.10 × 7,216.92
  4. Step 4: Simplify right side
    12,521.70x = 124,701,882.37
  5. Step 5: Solve for x
    x = 124,701,882.37/12,521.70
  6. Step 6: Final answer
    x = 9,958.86

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Half scale
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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.