Home / 5,377.29-7,420.68-2,987.21

Finding the Fourth Proportional to 5,377.29, 7,420.68 and 2,987.21

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Solution

The fourth proportional to 5,377.29, 7,420.68 and 2,987.21 is: 4,122.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,377.29 : 7,420.68 = 2,987.21 : x
  2. Step 2: Convert to fraction form
    5,377.29/7,420.68 = 2,987.21/x
  3. Step 3: Cross multiply
    5,377.29x = 7,420.68 × 2,987.21
  4. Step 4: Simplify right side
    5,377.29x = 22,167,092.40
  5. Step 5: Solve for x
    x = 22,167,092.40/5,377.29
  6. Step 6: Final answer
    x = 4,122.35

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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.