Home / 28,480.90-42,725.79-13,687.06

Finding the Fourth Proportional to 28,480.90, 42,725.79 and 13,687.06

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Solution

The fourth proportional to 28,480.90, 42,725.79 and 13,687.06 is: 20,532.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,480.90 : 42,725.79 = 13,687.06 : x
  2. Step 2: Convert to fraction form
    28,480.90/42,725.79 = 13,687.06/x
  3. Step 3: Cross multiply
    28,480.90x = 42,725.79 × 13,687.06
  4. Step 4: Simplify right side
    28,480.90x = 584,790,451.28
  5. Step 5: Solve for x
    x = 584,790,451.28/28,480.90
  6. Step 6: Final answer
    x = 20,532.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.