Home / 28,180.80-42,234.52-11,521.80

Finding the Fourth Proportional to 28,180.80, 42,234.52 and 11,521.80

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Solution

The fourth proportional to 28,180.80, 42,234.52 and 11,521.80 is: 17,267.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,180.80 : 42,234.52 = 11,521.80 : x
  2. Step 2: Convert to fraction form
    28,180.80/42,234.52 = 11,521.80/x
  3. Step 3: Cross multiply
    28,180.80x = 42,234.52 × 11,521.80
  4. Step 4: Simplify right side
    28,180.80x = 486,617,692.54
  5. Step 5: Solve for x
    x = 486,617,692.54/28,180.80
  6. Step 6: Final answer
    x = 17,267.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.