Home / 5,108.68-7,050.50-3,120.40

Finding the Fourth Proportional to 5,108.68, 7,050.50 and 3,120.40

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Solution

The fourth proportional to 5,108.68, 7,050.50 and 3,120.40 is: 4,306.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,108.68 : 7,050.50 = 3,120.40 : x
  2. Step 2: Convert to fraction form
    5,108.68/7,050.50 = 3,120.40/x
  3. Step 3: Cross multiply
    5,108.68x = 7,050.50 × 3,120.40
  4. Step 4: Simplify right side
    5,108.68x = 22,000,380.20
  5. Step 5: Solve for x
    x = 22,000,380.20/5,108.68
  6. Step 6: Final answer
    x = 4,306.47

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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.