Home / 21,177.41-31,766.78-7,853.72

Finding the Fourth Proportional to 21,177.41, 31,766.78 and 7,853.72

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Solution

The fourth proportional to 21,177.41, 31,766.78 and 7,853.72 is: 11,780.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,177.41 : 31,766.78 = 7,853.72 : x
  2. Step 2: Convert to fraction form
    21,177.41/31,766.78 = 7,853.72/x
  3. Step 3: Cross multiply
    21,177.41x = 31,766.78 × 7,853.72
  4. Step 4: Simplify right side
    21,177.41x = 249,487,395.42
  5. Step 5: Solve for x
    x = 249,487,395.42/21,177.41
  6. Step 6: Final answer
    x = 11,780.83

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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.