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Finding the Fourth Proportional to 13,236.61, 18,253.68 and 8,939.15

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Solution

The fourth proportional to 13,236.61, 18,253.68 and 8,939.15 is: 12,327.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,236.61 : 18,253.68 = 8,939.15 : x
  2. Step 2: Convert to fraction form
    13,236.61/18,253.68 = 8,939.15/x
  3. Step 3: Cross multiply
    13,236.61x = 18,253.68 × 8,939.15
  4. Step 4: Simplify right side
    13,236.61x = 163,172,383.57
  5. Step 5: Solve for x
    x = 163,172,383.57/13,236.61
  6. Step 6: Final answer
    x = 12,327.35

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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.