Home / 28,356.75-39,132.34-16,420.73

Finding the Fourth Proportional to 28,356.75, 39,132.34 and 16,420.73

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Solution

The fourth proportional to 28,356.75, 39,132.34 and 16,420.73 is: 22,660.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,356.75 : 39,132.34 = 16,420.73 : x
  2. Step 2: Convert to fraction form
    28,356.75/39,132.34 = 16,420.73/x
  3. Step 3: Cross multiply
    28,356.75x = 39,132.34 × 16,420.73
  4. Step 4: Simplify right side
    28,356.75x = 642,581,352.69
  5. Step 5: Solve for x
    x = 642,581,352.69/28,356.75
  6. Step 6: Final answer
    x = 22,660.61

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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.