Home / 11,115.18-15,326.73-7,134.78

Finding the Fourth Proportional to 11,115.18, 15,326.73 and 7,134.78

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Solution

The fourth proportional to 11,115.18, 15,326.73 and 7,134.78 is: 9,838.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,115.18 : 15,326.73 = 7,134.78 : x
  2. Step 2: Convert to fraction form
    11,115.18/15,326.73 = 7,134.78/x
  3. Step 3: Cross multiply
    11,115.18x = 15,326.73 × 7,134.78
  4. Step 4: Simplify right side
    11,115.18x = 109,352,846.67
  5. Step 5: Solve for x
    x = 109,352,846.67/11,115.18
  6. Step 6: Final answer
    x = 9,838.15

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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.