Home / 11,370.75-15,687.18-7,120.05

Finding the Fourth Proportional to 11,370.75, 15,687.18 and 7,120.05

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Solution

The fourth proportional to 11,370.75, 15,687.18 and 7,120.05 is: 9,822.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,370.75 : 15,687.18 = 7,120.05 : x
  2. Step 2: Convert to fraction form
    11,370.75/15,687.18 = 7,120.05/x
  3. Step 3: Cross multiply
    11,370.75x = 15,687.18 × 7,120.05
  4. Step 4: Simplify right side
    11,370.75x = 111,693,505.96
  5. Step 5: Solve for x
    x = 111,693,505.96/11,370.75
  6. Step 6: Final answer
    x = 9,822.88

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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.