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Finding the Fourth Proportional to 12,687.54, 17,516.76 and 8,152.06

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Solution

The fourth proportional to 12,687.54, 17,516.76 and 8,152.06 is: 11,254.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,687.54 : 17,516.76 = 8,152.06 : x
  2. Step 2: Convert to fraction form
    12,687.54/17,516.76 = 8,152.06/x
  3. Step 3: Cross multiply
    12,687.54x = 17,516.76 × 8,152.06
  4. Step 4: Simplify right side
    12,687.54x = 142,797,563.11
  5. Step 5: Solve for x
    x = 142,797,563.11/12,687.54
  6. Step 6: Final answer
    x = 11,254.95

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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.