Home / 13,867.68-20,810.88-5,109.60

Finding the Fourth Proportional to 13,867.68, 20,810.88 and 5,109.60

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Solution

The fourth proportional to 13,867.68, 20,810.88 and 5,109.60 is: 7,667.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,867.68 : 20,810.88 = 5,109.60 : x
  2. Step 2: Convert to fraction form
    13,867.68/20,810.88 = 5,109.60/x
  3. Step 3: Cross multiply
    13,867.68x = 20,810.88 × 5,109.60
  4. Step 4: Simplify right side
    13,867.68x = 106,335,272.45
  5. Step 5: Solve for x
    x = 106,335,272.45/13,867.68
  6. Step 6: Final answer
    x = 7,667.85

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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.