Home / 2,721.12-3,748.48-1,972.88

Finding the Fourth Proportional to 2,721.12, 3,748.48 and 1,972.88

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Solution

The fourth proportional to 2,721.12, 3,748.48 and 1,972.88 is: 2,717.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,721.12 : 3,748.48 = 1,972.88 : x
  2. Step 2: Convert to fraction form
    2,721.12/3,748.48 = 1,972.88/x
  3. Step 3: Cross multiply
    2,721.12x = 3,748.48 × 1,972.88
  4. Step 4: Simplify right side
    2,721.12x = 7,395,301.22
  5. Step 5: Solve for x
    x = 7,395,301.22/2,721.12
  6. Step 6: Final answer
    x = 2,717.74

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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.