Home / 20,820.08-28,731.38-12,751.04

Finding the Fourth Proportional to 20,820.08, 28,731.38 and 12,751.04

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Solution

The fourth proportional to 20,820.08, 28,731.38 and 12,751.04 is: 17,596.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,820.08 : 28,731.38 = 12,751.04 : x
  2. Step 2: Convert to fraction form
    20,820.08/28,731.38 = 12,751.04/x
  3. Step 3: Cross multiply
    20,820.08x = 28,731.38 × 12,751.04
  4. Step 4: Simplify right side
    20,820.08x = 366,354,975.64
  5. Step 5: Solve for x
    x = 366,354,975.64/20,820.08
  6. Step 6: Final answer
    x = 17,596.23

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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.