Home / 28,851.78-39,787.95-18,768.66

Finding the Fourth Proportional to 28,851.78, 39,787.95 and 18,768.66

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Solution

The fourth proportional to 28,851.78, 39,787.95 and 18,768.66 is: 25,882.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,851.78 : 39,787.95 = 18,768.66 : x
  2. Step 2: Convert to fraction form
    28,851.78/39,787.95 = 18,768.66/x
  3. Step 3: Cross multiply
    28,851.78x = 39,787.95 × 18,768.66
  4. Step 4: Simplify right side
    28,851.78x = 746,766,505.65
  5. Step 5: Solve for x
    x = 746,766,505.65/28,851.78
  6. Step 6: Final answer
    x = 25,882.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.