Home / 28,107.12-38,786.16-15,531.12

Finding the Fourth Proportional to 28,107.12, 38,786.16 and 15,531.12

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Solution

The fourth proportional to 28,107.12, 38,786.16 and 15,531.12 is: 21,432.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,107.12 : 38,786.16 = 15,531.12 : x
  2. Step 2: Convert to fraction form
    28,107.12/38,786.16 = 15,531.12/x
  3. Step 3: Cross multiply
    28,107.12x = 38,786.16 × 15,531.12
  4. Step 4: Simplify right side
    28,107.12x = 602,392,505.30
  5. Step 5: Solve for x
    x = 602,392,505.30/28,107.12
  6. Step 6: Final answer
    x = 21,432.03

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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.