Home / 30,909.20-42,651.56-18,973.04

Finding the Fourth Proportional to 30,909.20, 42,651.56 and 18,973.04

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Solution

The fourth proportional to 30,909.20, 42,651.56 and 18,973.04 is: 26,180.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,909.20 : 42,651.56 = 18,973.04 : x
  2. Step 2: Convert to fraction form
    30,909.20/42,651.56 = 18,973.04/x
  3. Step 3: Cross multiply
    30,909.20x = 42,651.56 × 18,973.04
  4. Step 4: Simplify right side
    30,909.20x = 809,229,753.94
  5. Step 5: Solve for x
    x = 809,229,753.94/30,909.20
  6. Step 6: Final answer
    x = 26,180.87

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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.