Home / 9,306.90-12,843.36-5,115.15

Finding the Fourth Proportional to 9,306.90, 12,843.36 and 5,115.15

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Solution

The fourth proportional to 9,306.90, 12,843.36 and 5,115.15 is: 7,058.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,306.90 : 12,843.36 = 5,115.15 : x
  2. Step 2: Convert to fraction form
    9,306.90/12,843.36 = 5,115.15/x
  3. Step 3: Cross multiply
    9,306.90x = 12,843.36 × 5,115.15
  4. Step 4: Simplify right side
    9,306.90x = 65,695,712.90
  5. Step 5: Solve for x
    x = 65,695,712.90/9,306.90
  6. Step 6: Final answer
    x = 7,058.82

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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.