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Finding the Fourth Proportional to 40,392.68, 60,581.34 and 13,739.88

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Solution

The fourth proportional to 40,392.68, 60,581.34 and 13,739.88 is: 20,607.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,392.68 : 60,581.34 = 13,739.88 : x
  2. Step 2: Convert to fraction form
    40,392.68/60,581.34 = 13,739.88/x
  3. Step 3: Cross multiply
    40,392.68x = 60,581.34 × 13,739.88
  4. Step 4: Simplify right side
    40,392.68x = 832,380,341.84
  5. Step 5: Solve for x
    x = 832,380,341.84/40,392.68
  6. Step 6: Final answer
    x = 20,607.21

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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.