Home / 28,623.70-42,939.60-8,900.20

Finding the Fourth Proportional to 28,623.70, 42,939.60 and 8,900.20

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Solution

The fourth proportional to 28,623.70, 42,939.60 and 8,900.20 is: 13,351.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,623.70 : 42,939.60 = 8,900.20 : x
  2. Step 2: Convert to fraction form
    28,623.70/42,939.60 = 8,900.20/x
  3. Step 3: Cross multiply
    28,623.70x = 42,939.60 × 8,900.20
  4. Step 4: Simplify right side
    28,623.70x = 382,171,027.92
  5. Step 5: Solve for x
    x = 382,171,027.92/28,623.70
  6. Step 6: Final answer
    x = 13,351.56

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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.