Home / 13,160.80-18,161.13-7,191.28

Finding the Fourth Proportional to 13,160.80, 18,161.13 and 7,191.28

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Solution

The fourth proportional to 13,160.80, 18,161.13 and 7,191.28 is: 9,923.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,160.80 : 18,161.13 = 7,191.28 : x
  2. Step 2: Convert to fraction form
    13,160.80/18,161.13 = 7,191.28/x
  3. Step 3: Cross multiply
    13,160.80x = 18,161.13 × 7,191.28
  4. Step 4: Simplify right side
    13,160.80x = 130,601,770.95
  5. Step 5: Solve for x
    x = 130,601,770.95/13,160.80
  6. Step 6: Final answer
    x = 9,923.54

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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.