Home / 13,920.19-20,881.50-3,531.94

Finding the Fourth Proportional to 13,920.19, 20,881.50 and 3,531.94

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Solution

The fourth proportional to 13,920.19, 20,881.50 and 3,531.94 is: 5,298.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,920.19 : 20,881.50 = 3,531.94 : x
  2. Step 2: Convert to fraction form
    13,920.19/20,881.50 = 3,531.94/x
  3. Step 3: Cross multiply
    13,920.19x = 20,881.50 × 3,531.94
  4. Step 4: Simplify right side
    13,920.19x = 73,752,139.66
  5. Step 5: Solve for x
    x = 73,752,139.66/13,920.19
  6. Step 6: Final answer
    x = 5,298.21

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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.