Home / 30,961.09-42,737.21-18,385.75

Finding the Fourth Proportional to 30,961.09, 42,737.21 and 18,385.75

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Solution

The fourth proportional to 30,961.09, 42,737.21 and 18,385.75 is: 25,378.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,961.09 : 42,737.21 = 18,385.75 : x
  2. Step 2: Convert to fraction form
    30,961.09/42,737.21 = 18,385.75/x
  3. Step 3: Cross multiply
    30,961.09x = 42,737.21 × 18,385.75
  4. Step 4: Simplify right side
    30,961.09x = 785,755,566.83
  5. Step 5: Solve for x
    x = 785,755,566.83/30,961.09
  6. Step 6: Final answer
    x = 25,378.81

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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.