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Finding the Fourth Proportional to 15,601.68, 21,529.11 and 8,885.97

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Solution

The fourth proportional to 15,601.68, 21,529.11 and 8,885.97 is: 12,261.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,601.68 : 21,529.11 = 8,885.97 : x
  2. Step 2: Convert to fraction form
    15,601.68/21,529.11 = 8,885.97/x
  3. Step 3: Cross multiply
    15,601.68x = 21,529.11 × 8,885.97
  4. Step 4: Simplify right side
    15,601.68x = 191,307,025.59
  5. Step 5: Solve for x
    x = 191,307,025.59/15,601.68
  6. Step 6: Final answer
    x = 12,261.95

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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.