Home / 20,551.20-28,360.56-11,119.76

Finding the Fourth Proportional to 20,551.20, 28,360.56 and 11,119.76

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Solution

The fourth proportional to 20,551.20, 28,360.56 and 11,119.76 is: 15,345.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,551.20 : 28,360.56 = 11,119.76 : x
  2. Step 2: Convert to fraction form
    20,551.20/28,360.56 = 11,119.76/x
  3. Step 3: Cross multiply
    20,551.20x = 28,360.56 × 11,119.76
  4. Step 4: Simplify right side
    20,551.20x = 315,362,620.67
  5. Step 5: Solve for x
    x = 315,362,620.67/20,551.20
  6. Step 6: Final answer
    x = 15,345.22

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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.