Home / 20,764.85-28,655.19-11,332.79

Finding the Fourth Proportional to 20,764.85, 28,655.19 and 11,332.79

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Solution

The fourth proportional to 20,764.85, 28,655.19 and 11,332.79 is: 15,639.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,764.85 : 28,655.19 = 11,332.79 : x
  2. Step 2: Convert to fraction form
    20,764.85/28,655.19 = 11,332.79/x
  3. Step 3: Cross multiply
    20,764.85x = 28,655.19 × 11,332.79
  4. Step 4: Simplify right side
    20,764.85x = 324,743,250.68
  5. Step 5: Solve for x
    x = 324,743,250.68/20,764.85
  6. Step 6: Final answer
    x = 15,639.08

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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.