Home / 20,632.12-28,478.84-13,180.12

Finding the Fourth Proportional to 20,632.12, 28,478.84 and 13,180.12

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Solution

The fourth proportional to 20,632.12, 28,478.84 and 13,180.12 is: 18,192.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,632.12 : 28,478.84 = 13,180.12 : x
  2. Step 2: Convert to fraction form
    20,632.12/28,478.84 = 13,180.12/x
  3. Step 3: Cross multiply
    20,632.12x = 28,478.84 × 13,180.12
  4. Step 4: Simplify right side
    20,632.12x = 375,354,528.66
  5. Step 5: Solve for x
    x = 375,354,528.66/20,632.12
  6. Step 6: Final answer
    x = 18,192.73

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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.