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Finding the Fourth Proportional to 40,391.68, 60,579.84 and 13,738.88

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Solution

The fourth proportional to 40,391.68, 60,579.84 and 13,738.88 is: 20,605.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,391.68 : 60,579.84 = 13,738.88 : x
  2. Step 2: Convert to fraction form
    40,391.68/60,579.84 = 13,738.88/x
  3. Step 3: Cross multiply
    40,391.68x = 60,579.84 × 13,738.88
  4. Step 4: Simplify right side
    40,391.68x = 832,299,152.18
  5. Step 5: Solve for x
    x = 832,299,152.18/40,391.68
  6. Step 6: Final answer
    x = 20,605.71

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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.