Home / 13,938.12-20,909.61-6,918.57

Finding the Fourth Proportional to 13,938.12, 20,909.61 and 6,918.57

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Solution

The fourth proportional to 13,938.12, 20,909.61 and 6,918.57 is: 10,379.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,938.12 : 20,909.61 = 6,918.57 : x
  2. Step 2: Convert to fraction form
    13,938.12/20,909.61 = 6,918.57/x
  3. Step 3: Cross multiply
    13,938.12x = 20,909.61 × 6,918.57
  4. Step 4: Simplify right side
    13,938.12x = 144,664,600.46
  5. Step 5: Solve for x
    x = 144,664,600.46/13,938.12
  6. Step 6: Final answer
    x = 10,379.06

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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.