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Finding the Fourth Proportional to 5,687.28, 7,848.63 and 3,169.40

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Solution

The fourth proportional to 5,687.28, 7,848.63 and 3,169.40 is: 4,373.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,687.28 : 7,848.63 = 3,169.40 : x
  2. Step 2: Convert to fraction form
    5,687.28/7,848.63 = 3,169.40/x
  3. Step 3: Cross multiply
    5,687.28x = 7,848.63 × 3,169.40
  4. Step 4: Simplify right side
    5,687.28x = 24,875,408.68
  5. Step 5: Solve for x
    x = 24,875,408.68/5,687.28
  6. Step 6: Final answer
    x = 4,373.87

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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.