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Finding the Fourth Proportional to 11,479.80, 15,835.44 and 7,229.19

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Solution

The fourth proportional to 11,479.80, 15,835.44 and 7,229.19 is: 9,972.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,479.80 : 15,835.44 = 7,229.19 : x
  2. Step 2: Convert to fraction form
    11,479.80/15,835.44 = 7,229.19/x
  3. Step 3: Cross multiply
    11,479.80x = 15,835.44 × 7,229.19
  4. Step 4: Simplify right side
    11,479.80x = 114,477,404.49
  5. Step 5: Solve for x
    x = 114,477,404.49/11,479.80
  6. Step 6: Final answer
    x = 9,972.07

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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.