Home / 20,947.68-28,908-11,516.04

Finding the Fourth Proportional to 20,947.68, 28,908 and 11,516.04

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Solution

The fourth proportional to 20,947.68, 28,908 and 11,516.04 is: 15,892.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,947.68 : 28,908 = 11,516.04 : x
  2. Step 2: Convert to fraction form
    20,947.68/28,908 = 11,516.04/x
  3. Step 3: Cross multiply
    20,947.68x = 28,908 × 11,516.04
  4. Step 4: Simplify right side
    20,947.68x = 332,905,684.32
  5. Step 5: Solve for x
    x = 332,905,684.32/20,947.68
  6. Step 6: Final answer
    x = 15,892.25

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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.