Home / 15,718.22-21,691.14-8,644.58

Finding the Fourth Proportional to 15,718.22, 21,691.14 and 8,644.58

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Solution

The fourth proportional to 15,718.22, 21,691.14 and 8,644.58 is: 11,929.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,718.22 : 21,691.14 = 8,644.58 : x
  2. Step 2: Convert to fraction form
    15,718.22/21,691.14 = 8,644.58/x
  3. Step 3: Cross multiply
    15,718.22x = 21,691.14 × 8,644.58
  4. Step 4: Simplify right side
    15,718.22x = 187,510,795.02
  5. Step 5: Solve for x
    x = 187,510,795.02/15,718.22
  6. Step 6: Final answer
    x = 11,929.52

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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.