Home / 7,988.51-11,983.51-2,721.75

Finding the Fourth Proportional to 7,988.51, 11,983.51 and 2,721.75

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Solution

The fourth proportional to 7,988.51, 11,983.51 and 2,721.75 is: 4,082.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,988.51 : 11,983.51 = 2,721.75 : x
  2. Step 2: Convert to fraction form
    7,988.51/11,983.51 = 2,721.75/x
  3. Step 3: Cross multiply
    7,988.51x = 11,983.51 × 2,721.75
  4. Step 4: Simplify right side
    7,988.51x = 32,616,111.54
  5. Step 5: Solve for x
    x = 32,616,111.54/7,988.51
  6. Step 6: Final answer
    x = 4,082.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.