Home / 15,718.34-21,691.23-8,644.74

Finding the Fourth Proportional to 15,718.34, 21,691.23 and 8,644.74

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Solution

The fourth proportional to 15,718.34, 21,691.23 and 8,644.74 is: 11,929.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,718.34 : 21,691.23 = 8,644.74 : x
  2. Step 2: Convert to fraction form
    15,718.34/21,691.23 = 8,644.74/x
  3. Step 3: Cross multiply
    15,718.34x = 21,691.23 × 8,644.74
  4. Step 4: Simplify right side
    15,718.34x = 187,515,043.63
  5. Step 5: Solve for x
    x = 187,515,043.63/15,718.34
  6. Step 6: Final answer
    x = 11,929.70

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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.