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Finding the Fourth Proportional to 8,400.58, 11,589.69 and 8,387.62

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Solution

The fourth proportional to 8,400.58, 11,589.69 and 8,387.62 is: 11,571.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,400.58 : 11,589.69 = 8,387.62 : x
  2. Step 2: Convert to fraction form
    8,400.58/11,589.69 = 8,387.62/x
  3. Step 3: Cross multiply
    8,400.58x = 11,589.69 × 8,387.62
  4. Step 4: Simplify right side
    8,400.58x = 97,209,915.64
  5. Step 5: Solve for x
    x = 97,209,915.64/8,400.58
  6. Step 6: Final answer
    x = 11,571.81

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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.