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Finding the Fourth Proportional to 5,489.76, 7,587.72 and 4,855.80

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Solution

The fourth proportional to 5,489.76, 7,587.72 and 4,855.80 is: 6,711.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,489.76 : 7,587.72 = 4,855.80 : x
  2. Step 2: Convert to fraction form
    5,489.76/7,587.72 = 4,855.80/x
  3. Step 3: Cross multiply
    5,489.76x = 7,587.72 × 4,855.80
  4. Step 4: Simplify right side
    5,489.76x = 36,844,450.78
  5. Step 5: Solve for x
    x = 36,844,450.78/5,489.76
  6. Step 6: Final answer
    x = 6,711.49

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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.