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Finding the Fourth Proportional to 40,576.80, 60,871.68 and 13,919.76

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Solution

The fourth proportional to 40,576.80, 60,871.68 and 13,919.76 is: 20,881.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,576.80 : 60,871.68 = 13,919.76 : x
  2. Step 2: Convert to fraction form
    40,576.80/60,871.68 = 13,919.76/x
  3. Step 3: Cross multiply
    40,576.80x = 60,871.68 × 13,919.76
  4. Step 4: Simplify right side
    40,576.80x = 847,319,176.40
  5. Step 5: Solve for x
    x = 847,319,176.40/40,576.80
  6. Step 6: Final answer
    x = 20,881.86

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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.