Home / 28,515.72-42,757.92-8,788.80

Finding the Fourth Proportional to 28,515.72, 42,757.92 and 8,788.80

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Solution

The fourth proportional to 28,515.72, 42,757.92 and 8,788.80 is: 13,178.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,515.72 : 42,757.92 = 8,788.80 : x
  2. Step 2: Convert to fraction form
    28,515.72/42,757.92 = 8,788.80/x
  3. Step 3: Cross multiply
    28,515.72x = 42,757.92 × 8,788.80
  4. Step 4: Simplify right side
    28,515.72x = 375,790,807.30
  5. Step 5: Solve for x
    x = 375,790,807.30/28,515.72
  6. Step 6: Final answer
    x = 13,178.37

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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.