Home / 20,679.20-28,536.93-11,247.71

Finding the Fourth Proportional to 20,679.20, 28,536.93 and 11,247.71

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Solution

The fourth proportional to 20,679.20, 28,536.93 and 11,247.71 is: 15,521.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679.20 : 28,536.93 = 11,247.71 : x
  2. Step 2: Convert to fraction form
    20,679.20/28,536.93 = 11,247.71/x
  3. Step 3: Cross multiply
    20,679.20x = 28,536.93 × 11,247.71
  4. Step 4: Simplify right side
    20,679.20x = 320,975,112.93
  5. Step 5: Solve for x
    x = 320,975,112.93/20,679.20
  6. Step 6: Final answer
    x = 15,521.64

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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.