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Finding the Fourth Proportional to 12,133.30, 16,729.05 and 9,886.90

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Solution

The fourth proportional to 12,133.30, 16,729.05 and 9,886.90 is: 13,631.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,133.30 : 16,729.05 = 9,886.90 : x
  2. Step 2: Convert to fraction form
    12,133.30/16,729.05 = 9,886.90/x
  3. Step 3: Cross multiply
    12,133.30x = 16,729.05 × 9,886.90
  4. Step 4: Simplify right side
    12,133.30x = 165,398,444.45
  5. Step 5: Solve for x
    x = 165,398,444.45/12,133.30
  6. Step 6: Final answer
    x = 13,631.78

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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.