Home / 11,280.16-16,920.80-9,786.88

Finding the Fourth Proportional to 11,280.16, 16,920.80 and 9,786.88

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Solution

The fourth proportional to 11,280.16, 16,920.80 and 9,786.88 is: 14,680.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,280.16 : 16,920.80 = 9,786.88 : x
  2. Step 2: Convert to fraction form
    11,280.16/16,920.80 = 9,786.88/x
  3. Step 3: Cross multiply
    11,280.16x = 16,920.80 × 9,786.88
  4. Step 4: Simplify right side
    11,280.16x = 165,601,839.10
  5. Step 5: Solve for x
    x = 165,601,839.10/11,280.16
  6. Step 6: Final answer
    x = 14,680.81

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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.