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Finding the Fourth Proportional to 40,479.98, 60,721.79 and 12,397.99

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Solution

The fourth proportional to 40,479.98, 60,721.79 and 12,397.99 is: 18,597.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,479.98 : 60,721.79 = 12,397.99 : x
  2. Step 2: Convert to fraction form
    40,479.98/60,721.79 = 12,397.99/x
  3. Step 3: Cross multiply
    40,479.98x = 60,721.79 × 12,397.99
  4. Step 4: Simplify right side
    40,479.98x = 752,827,926.79
  5. Step 5: Solve for x
    x = 752,827,926.79/40,479.98
  6. Step 6: Final answer
    x = 18,597.54

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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.