Home / 15,712.82-21,684.11-8,543.21

Finding the Fourth Proportional to 15,712.82, 21,684.11 and 8,543.21

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Solution

The fourth proportional to 15,712.82, 21,684.11 and 8,543.21 is: 11,789.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,712.82 : 21,684.11 = 8,543.21 : x
  2. Step 2: Convert to fraction form
    15,712.82/21,684.11 = 8,543.21/x
  3. Step 3: Cross multiply
    15,712.82x = 21,684.11 × 8,543.21
  4. Step 4: Simplify right side
    15,712.82x = 185,251,905.39
  5. Step 5: Solve for x
    x = 185,251,905.39/15,712.82
  6. Step 6: Final answer
    x = 11,789.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.