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Finding the Fourth Proportional to 15,718.41, 21,691.50 and 8,548.41

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Solution

The fourth proportional to 15,718.41, 21,691.50 and 8,548.41 is: 11,796.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,718.41 : 21,691.50 = 8,548.41 : x
  2. Step 2: Convert to fraction form
    15,718.41/21,691.50 = 8,548.41/x
  3. Step 3: Cross multiply
    15,718.41x = 21,691.50 × 8,548.41
  4. Step 4: Simplify right side
    15,718.41x = 185,427,792.77
  5. Step 5: Solve for x
    x = 185,427,792.77/15,718.41
  6. Step 6: Final answer
    x = 11,796.85

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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.