Home / 21,551.38-29,740.68-12,120.04

Finding the Fourth Proportional to 21,551.38, 29,740.68 and 12,120.04

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Solution

The fourth proportional to 21,551.38, 29,740.68 and 12,120.04 is: 16,725.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,551.38 : 29,740.68 = 12,120.04 : x
  2. Step 2: Convert to fraction form
    21,551.38/29,740.68 = 12,120.04/x
  3. Step 3: Cross multiply
    21,551.38x = 29,740.68 × 12,120.04
  4. Step 4: Simplify right side
    21,551.38x = 360,458,231.23
  5. Step 5: Solve for x
    x = 360,458,231.23/21,551.38
  6. Step 6: Final answer
    x = 16,725.53

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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.