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Finding the Fourth Proportional to 5,658.11, 7,807.15 and 3,388.76

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Solution

The fourth proportional to 5,658.11, 7,807.15 and 3,388.76 is: 4,675.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,658.11 : 7,807.15 = 3,388.76 : x
  2. Step 2: Convert to fraction form
    5,658.11/7,807.15 = 3,388.76/x
  3. Step 3: Cross multiply
    5,658.11x = 7,807.15 × 3,388.76
  4. Step 4: Simplify right side
    5,658.11x = 26,456,557.63
  5. Step 5: Solve for x
    x = 26,456,557.63/5,658.11
  6. Step 6: Final answer
    x = 4,675.86

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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.