Home / 20,834.28-28,751.36-11,403.45

Finding the Fourth Proportional to 20,834.28, 28,751.36 and 11,403.45

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Solution

The fourth proportional to 20,834.28, 28,751.36 and 11,403.45 is: 15,736.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,834.28 : 28,751.36 = 11,403.45 : x
  2. Step 2: Convert to fraction form
    20,834.28/28,751.36 = 11,403.45/x
  3. Step 3: Cross multiply
    20,834.28x = 28,751.36 × 11,403.45
  4. Step 4: Simplify right side
    20,834.28x = 327,864,639.17
  5. Step 5: Solve for x
    x = 327,864,639.17/20,834.28
  6. Step 6: Final answer
    x = 15,736.79

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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.