Home / 28,520.12-42,769.24-19,728.38

Finding the Fourth Proportional to 28,520.12, 42,769.24 and 19,728.38

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Solution

The fourth proportional to 28,520.12, 42,769.24 and 19,728.38 is: 29,585.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,520.12 : 42,769.24 = 19,728.38 : x
  2. Step 2: Convert to fraction form
    28,520.12/42,769.24 = 19,728.38/x
  3. Step 3: Cross multiply
    28,520.12x = 42,769.24 × 19,728.38
  4. Step 4: Simplify right side
    28,520.12x = 843,767,819.03
  5. Step 5: Solve for x
    x = 843,767,819.03/28,520.12
  6. Step 6: Final answer
    x = 29,585.00

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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.