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Finding the Fourth Proportional to 8,438.76, 11,649.16 and 5,799.78

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Solution

The fourth proportional to 8,438.76, 11,649.16 and 5,799.78 is: 8,006.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,438.76 : 11,649.16 = 5,799.78 : x
  2. Step 2: Convert to fraction form
    8,438.76/11,649.16 = 5,799.78/x
  3. Step 3: Cross multiply
    8,438.76x = 11,649.16 × 5,799.78
  4. Step 4: Simplify right side
    8,438.76x = 67,562,565.18
  5. Step 5: Solve for x
    x = 67,562,565.18/8,438.76
  6. Step 6: Final answer
    x = 8,006.22

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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.