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Finding the Fourth Proportional to 9,159.92, 13,739.92 and 2,920.08

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Solution

The fourth proportional to 9,159.92, 13,739.92 and 2,920.08 is: 4,380.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,159.92 : 13,739.92 = 2,920.08 : x
  2. Step 2: Convert to fraction form
    9,159.92/13,739.92 = 2,920.08/x
  3. Step 3: Cross multiply
    9,159.92x = 13,739.92 × 2,920.08
  4. Step 4: Simplify right side
    9,159.92x = 40,121,665.59
  5. Step 5: Solve for x
    x = 40,121,665.59/9,159.92
  6. Step 6: Final answer
    x = 4,380.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.