Home / 15,764.69-21,755.27-8,691.23

Finding the Fourth Proportional to 15,764.69, 21,755.27 and 8,691.23

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Solution

The fourth proportional to 15,764.69, 21,755.27 and 8,691.23 is: 11,993.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,764.69 : 21,755.27 = 8,691.23 : x
  2. Step 2: Convert to fraction form
    15,764.69/21,755.27 = 8,691.23/x
  3. Step 3: Cross multiply
    15,764.69x = 21,755.27 × 8,691.23
  4. Step 4: Simplify right side
    15,764.69x = 189,079,903.05
  5. Step 5: Solve for x
    x = 189,079,903.05/15,764.69
  6. Step 6: Final answer
    x = 11,993.89

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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.