Home / 5,108.65-7,656.90-2,642.20

Finding the Fourth Proportional to 5,108.65, 7,656.90 and 2,642.20

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Solution

The fourth proportional to 5,108.65, 7,656.90 and 2,642.20 is: 3,960.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,108.65 : 7,656.90 = 2,642.20 : x
  2. Step 2: Convert to fraction form
    5,108.65/7,656.90 = 2,642.20/x
  3. Step 3: Cross multiply
    5,108.65x = 7,656.90 × 2,642.20
  4. Step 4: Simplify right side
    5,108.65x = 20,231,061.18
  5. Step 5: Solve for x
    x = 20,231,061.18/5,108.65
  6. Step 6: Final answer
    x = 3,960.16

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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.