Home / 5,309.20-7,947.60-3,111.40

Finding the Fourth Proportional to 5,309.20, 7,947.60 and 3,111.40

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Solution

The fourth proportional to 5,309.20, 7,947.60 and 3,111.40 is: 4,657.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,309.20 : 7,947.60 = 3,111.40 : x
  2. Step 2: Convert to fraction form
    5,309.20/7,947.60 = 3,111.40/x
  3. Step 3: Cross multiply
    5,309.20x = 7,947.60 × 3,111.40
  4. Step 4: Simplify right side
    5,309.20x = 24,728,162.64
  5. Step 5: Solve for x
    x = 24,728,162.64/5,309.20
  6. Step 6: Final answer
    x = 4,657.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.