Home / 5,209.86-7,182.12-3,715.18

Finding the Fourth Proportional to 5,209.86, 7,182.12 and 3,715.18

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Solution

The fourth proportional to 5,209.86, 7,182.12 and 3,715.18 is: 5,121.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,209.86 : 7,182.12 = 3,715.18 : x
  2. Step 2: Convert to fraction form
    5,209.86/7,182.12 = 3,715.18/x
  3. Step 3: Cross multiply
    5,209.86x = 7,182.12 × 3,715.18
  4. Step 4: Simplify right side
    5,209.86x = 26,682,868.58
  5. Step 5: Solve for x
    x = 26,682,868.58/5,209.86
  6. Step 6: Final answer
    x = 5,121.61

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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.