Home / 28,589.79-42,877.74-11,940.78

Finding the Fourth Proportional to 28,589.79, 42,877.74 and 11,940.78

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Solution

The fourth proportional to 28,589.79, 42,877.74 and 11,940.78 is: 17,908.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,589.79 : 42,877.74 = 11,940.78 : x
  2. Step 2: Convert to fraction form
    28,589.79/42,877.74 = 11,940.78/x
  3. Step 3: Cross multiply
    28,589.79x = 42,877.74 × 11,940.78
  4. Step 4: Simplify right side
    28,589.79x = 511,993,660.24
  5. Step 5: Solve for x
    x = 511,993,660.24/28,589.79
  6. Step 6: Final answer
    x = 17,908.27

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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.