Home / 20,778.42-28,674.12-11,346.99

Finding the Fourth Proportional to 20,778.42, 28,674.12 and 11,346.99

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Solution

The fourth proportional to 20,778.42, 28,674.12 and 11,346.99 is: 15,658.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.42 : 28,674.12 = 11,346.99 : x
  2. Step 2: Convert to fraction form
    20,778.42/28,674.12 = 11,346.99/x
  3. Step 3: Cross multiply
    20,778.42x = 28,674.12 × 11,346.99
  4. Step 4: Simplify right side
    20,778.42x = 325,364,952.90
  5. Step 5: Solve for x
    x = 325,364,952.90/20,778.42
  6. Step 6: Final answer
    x = 15,658.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.