Home / 40,729.61-61,103.96-12,648.21

Finding the Fourth Proportional to 40,729.61, 61,103.96 and 12,648.21

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Solution

The fourth proportional to 40,729.61, 61,103.96 and 12,648.21 is: 18,975.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,729.61 : 61,103.96 = 12,648.21 : x
  2. Step 2: Convert to fraction form
    40,729.61/61,103.96 = 12,648.21/x
  3. Step 3: Cross multiply
    40,729.61x = 61,103.96 × 12,648.21
  4. Step 4: Simplify right side
    40,729.61x = 772,855,654.67
  5. Step 5: Solve for x
    x = 772,855,654.67/40,729.61
  6. Step 6: Final answer
    x = 18,975.28

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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.