Home / 13,868.40-20,810.84-5,109.46

Finding the Fourth Proportional to 13,868.40, 20,810.84 and 5,109.46

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Solution

The fourth proportional to 13,868.40, 20,810.84 and 5,109.46 is: 7,667.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,868.40 : 20,810.84 = 5,109.46 : x
  2. Step 2: Convert to fraction form
    13,868.40/20,810.84 = 5,109.46/x
  3. Step 3: Cross multiply
    13,868.40x = 20,810.84 × 5,109.46
  4. Step 4: Simplify right side
    13,868.40x = 106,332,154.55
  5. Step 5: Solve for x
    x = 106,332,154.55/13,868.40
  6. Step 6: Final answer
    x = 7,667.23

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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.