Home / 5,418.47-8,128.01-1,721

Finding the Fourth Proportional to 5,418.47, 8,128.01 and 1,721

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Solution

The fourth proportional to 5,418.47, 8,128.01 and 1,721 is: 2,581.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,418.47 : 8,128.01 = 1,721 : x
  2. Step 2: Convert to fraction form
    5,418.47/8,128.01 = 1,721/x
  3. Step 3: Cross multiply
    5,418.47x = 8,128.01 × 1,721
  4. Step 4: Simplify right side
    5,418.47x = 13,988,305.21
  5. Step 5: Solve for x
    x = 13,988,305.21/5,418.47
  6. Step 6: Final answer
    x = 2,581.60

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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.