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Finding the Fourth Proportional to 27,947.60, 41,920.20 and 9,479.60

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Solution

The fourth proportional to 27,947.60, 41,920.20 and 9,479.60 is: 14,218.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,947.60 : 41,920.20 = 9,479.60 : x
  2. Step 2: Convert to fraction form
    27,947.60/41,920.20 = 9,479.60/x
  3. Step 3: Cross multiply
    27,947.60x = 41,920.20 × 9,479.60
  4. Step 4: Simplify right side
    27,947.60x = 397,386,727.92
  5. Step 5: Solve for x
    x = 397,386,727.92/27,947.60
  6. Step 6: Final answer
    x = 14,218.99

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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.