Home / 30,825.92-42,528.39-20,229.95

Finding the Fourth Proportional to 30,825.92, 42,528.39 and 20,229.95

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Solution

The fourth proportional to 30,825.92, 42,528.39 and 20,229.95 is: 27,909.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,825.92 : 42,528.39 = 20,229.95 : x
  2. Step 2: Convert to fraction form
    30,825.92/42,528.39 = 20,229.95/x
  3. Step 3: Cross multiply
    30,825.92x = 42,528.39 × 20,229.95
  4. Step 4: Simplify right side
    30,825.92x = 860,347,203.28
  5. Step 5: Solve for x
    x = 860,347,203.28/30,825.92
  6. Step 6: Final answer
    x = 27,909.86

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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.