Home / 28,108.15-38,789.28-15,532.90

Finding the Fourth Proportional to 28,108.15, 38,789.28 and 15,532.90

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Solution

The fourth proportional to 28,108.15, 38,789.28 and 15,532.90 is: 21,435.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,108.15 : 38,789.28 = 15,532.90 : x
  2. Step 2: Convert to fraction form
    28,108.15/38,789.28 = 15,532.90/x
  3. Step 3: Cross multiply
    28,108.15x = 38,789.28 × 15,532.90
  4. Step 4: Simplify right side
    28,108.15x = 602,509,910.34
  5. Step 5: Solve for x
    x = 602,509,910.34/28,108.15
  6. Step 6: Final answer
    x = 21,435.42

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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.