Home / 16,920.80-25,363.92-11,978.72

Finding the Fourth Proportional to 16,920.80, 25,363.92 and 11,978.72

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Solution

The fourth proportional to 16,920.80, 25,363.92 and 11,978.72 is: 17,955.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,920.80 : 25,363.92 = 11,978.72 : x
  2. Step 2: Convert to fraction form
    16,920.80/25,363.92 = 11,978.72/x
  3. Step 3: Cross multiply
    16,920.80x = 25,363.92 × 11,978.72
  4. Step 4: Simplify right side
    16,920.80x = 303,827,295.78
  5. Step 5: Solve for x
    x = 303,827,295.78/16,920.80
  6. Step 6: Final answer
    x = 17,955.85

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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.