Home / 30,771.20-42,472.96-18,200.32

Finding the Fourth Proportional to 30,771.20, 42,472.96 and 18,200.32

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Solution

The fourth proportional to 30,771.20, 42,472.96 and 18,200.32 is: 25,121.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,771.20 : 42,472.96 = 18,200.32 : x
  2. Step 2: Convert to fraction form
    30,771.20/42,472.96 = 18,200.32/x
  3. Step 3: Cross multiply
    30,771.20x = 42,472.96 × 18,200.32
  4. Step 4: Simplify right side
    30,771.20x = 773,021,463.35
  5. Step 5: Solve for x
    x = 773,021,463.35/30,771.20
  6. Step 6: Final answer
    x = 25,121.59

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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.