Home / 5,211.52-7,189.62-3,115.66

Finding the Fourth Proportional to 5,211.52, 7,189.62 and 3,115.66

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Solution

The fourth proportional to 5,211.52, 7,189.62 and 3,115.66 is: 4,298.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,211.52 : 7,189.62 = 3,115.66 : x
  2. Step 2: Convert to fraction form
    5,211.52/7,189.62 = 3,115.66/x
  3. Step 3: Cross multiply
    5,211.52x = 7,189.62 × 3,115.66
  4. Step 4: Simplify right side
    5,211.52x = 22,400,411.45
  5. Step 5: Solve for x
    x = 22,400,411.45/5,211.52
  6. Step 6: Final answer
    x = 4,298.25

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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.