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Finding the Fourth Proportional to 8,993.80, 12,408.60 and 5,456.80

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Solution

The fourth proportional to 8,993.80, 12,408.60 and 5,456.80 is: 7,528.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,993.80 : 12,408.60 = 5,456.80 : x
  2. Step 2: Convert to fraction form
    8,993.80/12,408.60 = 5,456.80/x
  3. Step 3: Cross multiply
    8,993.80x = 12,408.60 × 5,456.80
  4. Step 4: Simplify right side
    8,993.80x = 67,711,248.48
  5. Step 5: Solve for x
    x = 67,711,248.48/8,993.80
  6. Step 6: Final answer
    x = 7,528.66

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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.