Home / 5,419.14-8,129.01-1,721.10

Finding the Fourth Proportional to 5,419.14, 8,129.01 and 1,721.10

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Solution

The fourth proportional to 5,419.14, 8,129.01 and 1,721.10 is: 2,581.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,419.14 : 8,129.01 = 1,721.10 : x
  2. Step 2: Convert to fraction form
    5,419.14/8,129.01 = 1,721.10/x
  3. Step 3: Cross multiply
    5,419.14x = 8,129.01 × 1,721.10
  4. Step 4: Simplify right side
    5,419.14x = 13,990,839.11
  5. Step 5: Solve for x
    x = 13,990,839.11/5,419.14
  6. Step 6: Final answer
    x = 2,581.75

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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.