Home / 5,225.12-7,211.60-3,129.12

Finding the Fourth Proportional to 5,225.12, 7,211.60 and 3,129.12

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Solution

The fourth proportional to 5,225.12, 7,211.60 and 3,129.12 is: 4,318.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,225.12 : 7,211.60 = 3,129.12 : x
  2. Step 2: Convert to fraction form
    5,225.12/7,211.60 = 3,129.12/x
  3. Step 3: Cross multiply
    5,225.12x = 7,211.60 × 3,129.12
  4. Step 4: Simplify right side
    5,225.12x = 22,565,961.79
  5. Step 5: Solve for x
    x = 22,565,961.79/5,225.12
  6. Step 6: Final answer
    x = 4,318.75

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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.