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Finding the Fourth Proportional to 47,438.70, 65,479.17 and 27,309.78

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Solution

The fourth proportional to 47,438.70, 65,479.17 and 27,309.78 is: 37,695.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,438.70 : 65,479.17 = 27,309.78 : x
  2. Step 2: Convert to fraction form
    47,438.70/65,479.17 = 27,309.78/x
  3. Step 3: Cross multiply
    47,438.70x = 65,479.17 × 27,309.78
  4. Step 4: Simplify right side
    47,438.70x = 1,788,221,727.28
  5. Step 5: Solve for x
    x = 1,788,221,727.28/47,438.70
  6. Step 6: Final answer
    x = 37,695.42

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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.