Home / 20,751.12-28,636.56-11,320.20

Finding the Fourth Proportional to 20,751.12, 28,636.56 and 11,320.20

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Solution

The fourth proportional to 20,751.12, 28,636.56 and 11,320.20 is: 15,621.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,751.12 : 28,636.56 = 11,320.20 : x
  2. Step 2: Convert to fraction form
    20,751.12/28,636.56 = 11,320.20/x
  3. Step 3: Cross multiply
    20,751.12x = 28,636.56 × 11,320.20
  4. Step 4: Simplify right side
    20,751.12x = 324,171,586.51
  5. Step 5: Solve for x
    x = 324,171,586.51/20,751.12
  6. Step 6: Final answer
    x = 15,621.88

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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.