Home / 12,947.20-17,868.80-8,755.20

Finding the Fourth Proportional to 12,947.20, 17,868.80 and 8,755.20

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Solution

The fourth proportional to 12,947.20, 17,868.80 and 8,755.20 is: 12,083.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,947.20 : 17,868.80 = 8,755.20 : x
  2. Step 2: Convert to fraction form
    12,947.20/17,868.80 = 8,755.20/x
  3. Step 3: Cross multiply
    12,947.20x = 17,868.80 × 8,755.20
  4. Step 4: Simplify right side
    12,947.20x = 156,444,917.76
  5. Step 5: Solve for x
    x = 156,444,917.76/12,947.20
  6. Step 6: Final answer
    x = 12,083.30

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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.