Home / 30,520.98-42,122.43-18,591.30

Finding the Fourth Proportional to 30,520.98, 42,122.43 and 18,591.30

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Solution

The fourth proportional to 30,520.98, 42,122.43 and 18,591.30 is: 25,658.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,520.98 : 42,122.43 = 18,591.30 : x
  2. Step 2: Convert to fraction form
    30,520.98/42,122.43 = 18,591.30/x
  3. Step 3: Cross multiply
    30,520.98x = 42,122.43 × 18,591.30
  4. Step 4: Simplify right side
    30,520.98x = 783,110,732.86
  5. Step 5: Solve for x
    x = 783,110,732.86/30,520.98
  6. Step 6: Final answer
    x = 25,658.11

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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.