Home / 20,751.26-28,636.90-11,319.62

Finding the Fourth Proportional to 20,751.26, 28,636.90 and 11,319.62

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Solution

The fourth proportional to 20,751.26, 28,636.90 and 11,319.62 is: 15,621.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,751.26 : 28,636.90 = 11,319.62 : x
  2. Step 2: Convert to fraction form
    20,751.26/28,636.90 = 11,319.62/x
  3. Step 3: Cross multiply
    20,751.26x = 28,636.90 × 11,319.62
  4. Step 4: Simplify right side
    20,751.26x = 324,158,825.98
  5. Step 5: Solve for x
    x = 324,158,825.98/20,751.26
  6. Step 6: Final answer
    x = 15,621.16

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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.