Home / 28,356.88-39,132.51-16,420.85

Finding the Fourth Proportional to 28,356.88, 39,132.51 and 16,420.85

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Solution

The fourth proportional to 28,356.88, 39,132.51 and 16,420.85 is: 22,660.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,356.88 : 39,132.51 = 16,420.85 : x
  2. Step 2: Convert to fraction form
    28,356.88/39,132.51 = 16,420.85/x
  3. Step 3: Cross multiply
    28,356.88x = 39,132.51 × 16,420.85
  4. Step 4: Simplify right side
    28,356.88x = 642,589,076.83
  5. Step 5: Solve for x
    x = 642,589,076.83/28,356.88
  6. Step 6: Final answer
    x = 22,660.78

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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.