Home / 20,833.28-28,749.68-11,401.60

Finding the Fourth Proportional to 20,833.28, 28,749.68 and 11,401.60

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Solution

The fourth proportional to 20,833.28, 28,749.68 and 11,401.60 is: 15,734.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,833.28 : 28,749.68 = 11,401.60 : x
  2. Step 2: Convert to fraction form
    20,833.28/28,749.68 = 11,401.60/x
  3. Step 3: Cross multiply
    20,833.28x = 28,749.68 × 11,401.60
  4. Step 4: Simplify right side
    20,833.28x = 327,792,351.49
  5. Step 5: Solve for x
    x = 327,792,351.49/20,833.28
  6. Step 6: Final answer
    x = 15,734.07

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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.