Home / 20,751.06-28,636.55-11,319.82

Finding the Fourth Proportional to 20,751.06, 28,636.55 and 11,319.82

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Solution

The fourth proportional to 20,751.06, 28,636.55 and 11,319.82 is: 15,621.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,751.06 : 28,636.55 = 11,319.82 : x
  2. Step 2: Convert to fraction form
    20,751.06/28,636.55 = 11,319.82/x
  3. Step 3: Cross multiply
    20,751.06x = 28,636.55 × 11,319.82
  4. Step 4: Simplify right side
    20,751.06x = 324,160,591.42
  5. Step 5: Solve for x
    x = 324,160,591.42/20,751.06
  6. Step 6: Final answer
    x = 15,621.40

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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.