Home / 2,721.86-3,756-1,542.90

Finding the Fourth Proportional to 2,721.86, 3,756 and 1,542.90

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Solution

The fourth proportional to 2,721.86, 3,756 and 1,542.90 is: 2,129.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,721.86 : 3,756 = 1,542.90 : x
  2. Step 2: Convert to fraction form
    2,721.86/3,756 = 1,542.90/x
  3. Step 3: Cross multiply
    2,721.86x = 3,756 × 1,542.90
  4. Step 4: Simplify right side
    2,721.86x = 5,795,132.40
  5. Step 5: Solve for x
    x = 5,795,132.40/2,721.86
  6. Step 6: Final answer
    x = 2,129.11

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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.