Home / 20,563.96-28,378.25-11,132.51

Finding the Fourth Proportional to 20,563.96, 28,378.25 and 11,132.51

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Solution

The fourth proportional to 20,563.96, 28,378.25 and 11,132.51 is: 15,362.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,563.96 : 28,378.25 = 11,132.51 : x
  2. Step 2: Convert to fraction form
    20,563.96/28,378.25 = 11,132.51/x
  3. Step 3: Cross multiply
    20,563.96x = 28,378.25 × 11,132.51
  4. Step 4: Simplify right side
    20,563.96x = 315,921,151.91
  5. Step 5: Solve for x
    x = 315,921,151.91/20,563.96
  6. Step 6: Final answer
    x = 15,362.86

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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.