Home / 8,128.76-11,217.68-4,402.76

Finding the Fourth Proportional to 8,128.76, 11,217.68 and 4,402.76

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Solution

The fourth proportional to 8,128.76, 11,217.68 and 4,402.76 is: 6,075.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128.76 : 11,217.68 = 4,402.76 : x
  2. Step 2: Convert to fraction form
    8,128.76/11,217.68 = 4,402.76/x
  3. Step 3: Cross multiply
    8,128.76x = 11,217.68 × 4,402.76
  4. Step 4: Simplify right side
    8,128.76x = 49,388,752.80
  5. Step 5: Solve for x
    x = 49,388,752.80/8,128.76
  6. Step 6: Final answer
    x = 6,075.80

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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.