Home / 28,266.20-42,399.30-7,489.70

Finding the Fourth Proportional to 28,266.20, 42,399.30 and 7,489.70

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Solution

The fourth proportional to 28,266.20, 42,399.30 and 7,489.70 is: 11,234.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,266.20 : 42,399.30 = 7,489.70 : x
  2. Step 2: Convert to fraction form
    28,266.20/42,399.30 = 7,489.70/x
  3. Step 3: Cross multiply
    28,266.20x = 42,399.30 × 7,489.70
  4. Step 4: Simplify right side
    28,266.20x = 317,558,037.21
  5. Step 5: Solve for x
    x = 317,558,037.21/28,266.20
  6. Step 6: Final answer
    x = 11,234.55

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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.