Home / 12,291.40-18,435.68-3,407.39

Finding the Fourth Proportional to 12,291.40, 18,435.68 and 3,407.39

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Solution

The fourth proportional to 12,291.40, 18,435.68 and 3,407.39 is: 5,110.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,291.40 : 18,435.68 = 3,407.39 : x
  2. Step 2: Convert to fraction form
    12,291.40/18,435.68 = 3,407.39/x
  3. Step 3: Cross multiply
    12,291.40x = 18,435.68 × 3,407.39
  4. Step 4: Simplify right side
    12,291.40x = 62,817,551.68
  5. Step 5: Solve for x
    x = 62,817,551.68/12,291.40
  6. Step 6: Final answer
    x = 5,110.69

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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.