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Finding the Fourth Proportional to 10,987.55, 16,479.50 and 3,966.22

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Solution

The fourth proportional to 10,987.55, 16,479.50 and 3,966.22 is: 5,948.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,987.55 : 16,479.50 = 3,966.22 : x
  2. Step 2: Convert to fraction form
    10,987.55/16,479.50 = 3,966.22/x
  3. Step 3: Cross multiply
    10,987.55x = 16,479.50 × 3,966.22
  4. Step 4: Simplify right side
    10,987.55x = 65,361,252.87
  5. Step 5: Solve for x
    x = 65,361,252.87/10,987.55
  6. Step 6: Final answer
    x = 5,948.67

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.