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Finding the Fourth Proportional to 8,988.80, 12,404.00 and 5,211.68

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Solution

The fourth proportional to 8,988.80, 12,404.00 and 5,211.68 is: 7,191.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,988.80 : 12,404.00 = 5,211.68 : x
  2. Step 2: Convert to fraction form
    8,988.80/12,404.00 = 5,211.68/x
  3. Step 3: Cross multiply
    8,988.80x = 12,404.00 × 5,211.68
  4. Step 4: Simplify right side
    8,988.80x = 64,645,629.73
  5. Step 5: Solve for x
    x = 64,645,629.73/8,988.80
  6. Step 6: Final answer
    x = 7,191.80

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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.