Home / 20,632.88-28,479.86-13,180.88

Finding the Fourth Proportional to 20,632.88, 28,479.86 and 13,180.88

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Solution

The fourth proportional to 20,632.88, 28,479.86 and 13,180.88 is: 18,193.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,632.88 : 28,479.86 = 13,180.88 : x
  2. Step 2: Convert to fraction form
    20,632.88/28,479.86 = 13,180.88/x
  3. Step 3: Cross multiply
    20,632.88x = 28,479.86 × 13,180.88
  4. Step 4: Simplify right side
    20,632.88x = 375,389,408.77
  5. Step 5: Solve for x
    x = 375,389,408.77/20,632.88
  6. Step 6: Final answer
    x = 18,193.75

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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.