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Finding the Fourth Proportional to 39,909.61, 55,080.24 and 22,919.16

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Solution

The fourth proportional to 39,909.61, 55,080.24 and 22,919.16 is: 31,631.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,909.61 : 55,080.24 = 22,919.16 : x
  2. Step 2: Convert to fraction form
    39,909.61/55,080.24 = 22,919.16/x
  3. Step 3: Cross multiply
    39,909.61x = 55,080.24 × 22,919.16
  4. Step 4: Simplify right side
    39,909.61x = 1,262,392,833.40
  5. Step 5: Solve for x
    x = 1,262,392,833.40/39,909.61
  6. Step 6: Final answer
    x = 31,631.30

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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.