Home / 13,930.79-20,877.28-7,681.43

Finding the Fourth Proportional to 13,930.79, 20,877.28 and 7,681.43

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Solution

The fourth proportional to 13,930.79, 20,877.28 and 7,681.43 is: 11,511.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,930.79 : 20,877.28 = 7,681.43 : x
  2. Step 2: Convert to fraction form
    13,930.79/20,877.28 = 7,681.43/x
  3. Step 3: Cross multiply
    13,930.79x = 20,877.28 × 7,681.43
  4. Step 4: Simplify right side
    13,930.79x = 160,367,397.90
  5. Step 5: Solve for x
    x = 160,367,397.90/13,930.79
  6. Step 6: Final answer
    x = 11,511.73

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1.5x scale

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.