Home / 5,377.86-7,420.88-2,987.75

Finding the Fourth Proportional to 5,377.86, 7,420.88 and 2,987.75

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Solution

The fourth proportional to 5,377.86, 7,420.88 and 2,987.75 is: 4,122.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,377.86 : 7,420.88 = 2,987.75 : x
  2. Step 2: Convert to fraction form
    5,377.86/7,420.88 = 2,987.75/x
  3. Step 3: Cross multiply
    5,377.86x = 7,420.88 × 2,987.75
  4. Step 4: Simplify right side
    5,377.86x = 22,171,760.24
  5. Step 5: Solve for x
    x = 22,171,760.24/5,377.86
  6. Step 6: Final answer
    x = 4,122.78

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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.