Home / 13,868.90-20,811.59-5,109.96

Finding the Fourth Proportional to 13,868.90, 20,811.59 and 5,109.96

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Solution

The fourth proportional to 13,868.90, 20,811.59 and 5,109.96 is: 7,667.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,868.90 : 20,811.59 = 5,109.96 : x
  2. Step 2: Convert to fraction form
    13,868.90/20,811.59 = 5,109.96/x
  3. Step 3: Cross multiply
    13,868.90x = 20,811.59 × 5,109.96
  4. Step 4: Simplify right side
    13,868.90x = 106,346,392.44
  5. Step 5: Solve for x
    x = 106,346,392.44/13,868.90
  6. Step 6: Final answer
    x = 7,667.98

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1.5x scale

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.