Home / 7,487.60-11,231.40-6,681.20

Finding the Fourth Proportional to 7,487.60, 11,231.40 and 6,681.20

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Solution

The fourth proportional to 7,487.60, 11,231.40 and 6,681.20 is: 10,021.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,487.60 : 11,231.40 = 6,681.20 : x
  2. Step 2: Convert to fraction form
    7,487.60/11,231.40 = 6,681.20/x
  3. Step 3: Cross multiply
    7,487.60x = 11,231.40 × 6,681.20
  4. Step 4: Simplify right side
    7,487.60x = 75,039,229.68
  5. Step 5: Solve for x
    x = 75,039,229.68/7,487.60
  6. Step 6: Final answer
    x = 10,021.80

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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.