Home / 15,759.11-21,747.39-8,685.38

Finding the Fourth Proportional to 15,759.11, 21,747.39 and 8,685.38

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Solution

The fourth proportional to 15,759.11, 21,747.39 and 8,685.38 is: 11,985.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,759.11 : 21,747.39 = 8,685.38 : x
  2. Step 2: Convert to fraction form
    15,759.11/21,747.39 = 8,685.38/x
  3. Step 3: Cross multiply
    15,759.11x = 21,747.39 × 8,685.38
  4. Step 4: Simplify right side
    15,759.11x = 188,884,367.96
  5. Step 5: Solve for x
    x = 188,884,367.96/15,759.11
  6. Step 6: Final answer
    x = 11,985.72

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Double scale
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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.