Home / 12,419.19-17,138.61-7,113.90

Finding the Fourth Proportional to 12,419.19, 17,138.61 and 7,113.90

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Solution

The fourth proportional to 12,419.19, 17,138.61 and 7,113.90 is: 9,817.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,419.19 : 17,138.61 = 7,113.90 : x
  2. Step 2: Convert to fraction form
    12,419.19/17,138.61 = 7,113.90/x
  3. Step 3: Cross multiply
    12,419.19x = 17,138.61 × 7,113.90
  4. Step 4: Simplify right side
    12,419.19x = 121,922,357.68
  5. Step 5: Solve for x
    x = 121,922,357.68/12,419.19
  6. Step 6: Final answer
    x = 9,817.26

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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.