Home / 28,189.20-42,267.60-8,464.80

Finding the Fourth Proportional to 28,189.20, 42,267.60 and 8,464.80

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Solution

The fourth proportional to 28,189.20, 42,267.60 and 8,464.80 is: 12,692.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,189.20 : 42,267.60 = 8,464.80 : x
  2. Step 2: Convert to fraction form
    28,189.20/42,267.60 = 8,464.80/x
  3. Step 3: Cross multiply
    28,189.20x = 42,267.60 × 8,464.80
  4. Step 4: Simplify right side
    28,189.20x = 357,786,780.48
  5. Step 5: Solve for x
    x = 357,786,780.48/28,189.20
  6. Step 6: Final answer
    x = 12,692.34

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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.