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Finding the Fourth Proportional to 8,986.80, 13,480.20 and 7,561.20

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Solution

The fourth proportional to 8,986.80, 13,480.20 and 7,561.20 is: 11,341.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,986.80 : 13,480.20 = 7,561.20 : x
  2. Step 2: Convert to fraction form
    8,986.80/13,480.20 = 7,561.20/x
  3. Step 3: Cross multiply
    8,986.80x = 13,480.20 × 7,561.20
  4. Step 4: Simplify right side
    8,986.80x = 101,926,488.24
  5. Step 5: Solve for x
    x = 101,926,488.24/8,986.80
  6. Step 6: Final answer
    x = 11,341.80

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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.