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Finding the Fourth Proportional to 8,987.20, 13,480.80 and 6,800.20

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Solution

The fourth proportional to 8,987.20, 13,480.80 and 6,800.20 is: 10,200.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,987.20 : 13,480.80 = 6,800.20 : x
  2. Step 2: Convert to fraction form
    8,987.20/13,480.80 = 6,800.20/x
  3. Step 3: Cross multiply
    8,987.20x = 13,480.80 × 6,800.20
  4. Step 4: Simplify right side
    8,987.20x = 91,672,136.16
  5. Step 5: Solve for x
    x = 91,672,136.16/8,987.20
  6. Step 6: Final answer
    x = 10,200.30

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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.