Home / 10,865.16-16,286.80-4,288.80

Finding the Fourth Proportional to 10,865.16, 16,286.80 and 4,288.80

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Solution

The fourth proportional to 10,865.16, 16,286.80 and 4,288.80 is: 6,428.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,865.16 : 16,286.80 = 4,288.80 : x
  2. Step 2: Convert to fraction form
    10,865.16/16,286.80 = 4,288.80/x
  3. Step 3: Cross multiply
    10,865.16x = 16,286.80 × 4,288.80
  4. Step 4: Simplify right side
    10,865.16x = 69,850,827.84
  5. Step 5: Solve for x
    x = 69,850,827.84/10,865.16
  6. Step 6: Final answer
    x = 6,428.88

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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.