Home / 30,102.45-41,520.72-20,654.61

Finding the Fourth Proportional to 30,102.45, 41,520.72 and 20,654.61

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Solution

The fourth proportional to 30,102.45, 41,520.72 and 20,654.61 is: 28,489.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,102.45 : 41,520.72 = 20,654.61 : x
  2. Step 2: Convert to fraction form
    30,102.45/41,520.72 = 20,654.61/x
  3. Step 3: Cross multiply
    30,102.45x = 41,520.72 × 20,654.61
  4. Step 4: Simplify right side
    30,102.45x = 857,594,278.52
  5. Step 5: Solve for x
    x = 857,594,278.52/30,102.45
  6. Step 6: Final answer
    x = 28,489.19

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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.