Home / 2,721.78-3,756.91-1,543.63

Finding the Fourth Proportional to 2,721.78, 3,756.91 and 1,543.63

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Solution

The fourth proportional to 2,721.78, 3,756.91 and 1,543.63 is: 2,130.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,721.78 : 3,756.91 = 1,543.63 : x
  2. Step 2: Convert to fraction form
    2,721.78/3,756.91 = 1,543.63/x
  3. Step 3: Cross multiply
    2,721.78x = 3,756.91 × 1,543.63
  4. Step 4: Simplify right side
    2,721.78x = 5,799,278.98
  5. Step 5: Solve for x
    x = 5,799,278.98/2,721.78
  6. Step 6: Final answer
    x = 2,130.69

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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.