Home / 20,947.91-28,908.59-11,388.33

Finding the Fourth Proportional to 20,947.91, 28,908.59 and 11,388.33

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Solution

The fourth proportional to 20,947.91, 28,908.59 and 11,388.33 is: 15,716.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,947.91 : 28,908.59 = 11,388.33 : x
  2. Step 2: Convert to fraction form
    20,947.91/28,908.59 = 11,388.33/x
  3. Step 3: Cross multiply
    20,947.91x = 28,908.59 × 11,388.33
  4. Step 4: Simplify right side
    20,947.91x = 329,220,505.81
  5. Step 5: Solve for x
    x = 329,220,505.81/20,947.91
  6. Step 6: Final answer
    x = 15,716.15

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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.