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Finding the Fourth Proportional to 5,471.88, 7,551.18 and 2,987.88

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Solution

The fourth proportional to 5,471.88, 7,551.18 and 2,987.88 is: 4,123.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,471.88 : 7,551.18 = 2,987.88 : x
  2. Step 2: Convert to fraction form
    5,471.88/7,551.18 = 2,987.88/x
  3. Step 3: Cross multiply
    5,471.88x = 7,551.18 × 2,987.88
  4. Step 4: Simplify right side
    5,471.88x = 22,562,019.70
  5. Step 5: Solve for x
    x = 22,562,019.70/5,471.88
  6. Step 6: Final answer
    x = 4,123.27

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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.