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Finding the Fourth Proportional to 38,612.88, 57,908.88 and 13,649.64

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Solution

The fourth proportional to 38,612.88, 57,908.88 and 13,649.64 is: 20,470.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,612.88 : 57,908.88 = 13,649.64 : x
  2. Step 2: Convert to fraction form
    38,612.88/57,908.88 = 13,649.64/x
  3. Step 3: Cross multiply
    38,612.88x = 57,908.88 × 13,649.64
  4. Step 4: Simplify right side
    38,612.88x = 790,435,364.80
  5. Step 5: Solve for x
    x = 790,435,364.80/38,612.88
  6. Step 6: Final answer
    x = 20,470.77

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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.