Home / 8,139.81-11,229.39-4,776.69

Finding the Fourth Proportional to 8,139.81, 11,229.39 and 4,776.69

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Solution

The fourth proportional to 8,139.81, 11,229.39 and 4,776.69 is: 6,589.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,139.81 : 11,229.39 = 4,776.69 : x
  2. Step 2: Convert to fraction form
    8,139.81/11,229.39 = 4,776.69/x
  3. Step 3: Cross multiply
    8,139.81x = 11,229.39 × 4,776.69
  4. Step 4: Simplify right side
    8,139.81x = 53,639,291.04
  5. Step 5: Solve for x
    x = 53,639,291.04/8,139.81
  6. Step 6: Final answer
    x = 6,589.75

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Half scale
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Double scale
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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.