Home / 30,542.80-42,147.08-17,965.12

Finding the Fourth Proportional to 30,542.80, 42,147.08 and 17,965.12

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Solution

The fourth proportional to 30,542.80, 42,147.08 and 17,965.12 is: 24,790.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,542.80 : 42,147.08 = 17,965.12 : x
  2. Step 2: Convert to fraction form
    30,542.80/42,147.08 = 17,965.12/x
  3. Step 3: Cross multiply
    30,542.80x = 42,147.08 × 17,965.12
  4. Step 4: Simplify right side
    30,542.80x = 757,177,349.85
  5. Step 5: Solve for x
    x = 757,177,349.85/30,542.80
  6. Step 6: Final answer
    x = 24,790.70

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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.