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Finding the Fourth Proportional to 5,389.92, 7,439.92 and 3,709.92

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Solution

The fourth proportional to 5,389.92, 7,439.92 and 3,709.92 is: 5,120.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,389.92 : 7,439.92 = 3,709.92 : x
  2. Step 2: Convert to fraction form
    5,389.92/7,439.92 = 3,709.92/x
  3. Step 3: Cross multiply
    5,389.92x = 7,439.92 × 3,709.92
  4. Step 4: Simplify right side
    5,389.92x = 27,601,508.01
  5. Step 5: Solve for x
    x = 27,601,508.01/5,389.92
  6. Step 6: Final answer
    x = 5,120.95

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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.