Home / 15,718.95-21,691.64-8,645.31

Finding the Fourth Proportional to 15,718.95, 21,691.64 and 8,645.31

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Solution

The fourth proportional to 15,718.95, 21,691.64 and 8,645.31 is: 11,930.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,718.95 : 21,691.64 = 8,645.31 : x
  2. Step 2: Convert to fraction form
    15,718.95/21,691.64 = 8,645.31/x
  3. Step 3: Cross multiply
    15,718.95x = 21,691.64 × 8,645.31
  4. Step 4: Simplify right side
    15,718.95x = 187,530,908.98
  5. Step 5: Solve for x
    x = 187,530,908.98/15,718.95
  6. Step 6: Final answer
    x = 11,930.24

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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.