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Finding the Fourth Proportional to 12,236.40, 16,862.04 and 8,689.68

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Solution

The fourth proportional to 12,236.40, 16,862.04 and 8,689.68 is: 11,974.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,236.40 : 16,862.04 = 8,689.68 : x
  2. Step 2: Convert to fraction form
    12,236.40/16,862.04 = 8,689.68/x
  3. Step 3: Cross multiply
    12,236.40x = 16,862.04 × 8,689.68
  4. Step 4: Simplify right side
    12,236.40x = 146,525,731.75
  5. Step 5: Solve for x
    x = 146,525,731.75/12,236.40
  6. Step 6: Final answer
    x = 11,974.58

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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.