Home / 13,909.80-20,867.44-5,144.79

Finding the Fourth Proportional to 13,909.80, 20,867.44 and 5,144.79

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Solution

The fourth proportional to 13,909.80, 20,867.44 and 5,144.79 is: 7,718.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,909.80 : 20,867.44 = 5,144.79 : x
  2. Step 2: Convert to fraction form
    13,909.80/20,867.44 = 5,144.79/x
  3. Step 3: Cross multiply
    13,909.80x = 20,867.44 × 5,144.79
  4. Step 4: Simplify right side
    13,909.80x = 107,358,596.64
  5. Step 5: Solve for x
    x = 107,358,596.64/13,909.80
  6. Step 6: Final answer
    x = 7,718.20

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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.