Home / 13,125.20-18,112.80-7,156.92

Finding the Fourth Proportional to 13,125.20, 18,112.80 and 7,156.92

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Solution

The fourth proportional to 13,125.20, 18,112.80 and 7,156.92 is: 9,876.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,125.20 : 18,112.80 = 7,156.92 : x
  2. Step 2: Convert to fraction form
    13,125.20/18,112.80 = 7,156.92/x
  3. Step 3: Cross multiply
    13,125.20x = 18,112.80 × 7,156.92
  4. Step 4: Simplify right side
    13,125.20x = 129,631,860.58
  5. Step 5: Solve for x
    x = 129,631,860.58/13,125.20
  6. Step 6: Final answer
    x = 9,876.56

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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.