Home / 8,218.76-11,351.60-5,561.56

Finding the Fourth Proportional to 8,218.76, 11,351.60 and 5,561.56

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Solution

The fourth proportional to 8,218.76, 11,351.60 and 5,561.56 is: 7,681.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,218.76 : 11,351.60 = 5,561.56 : x
  2. Step 2: Convert to fraction form
    8,218.76/11,351.60 = 5,561.56/x
  3. Step 3: Cross multiply
    8,218.76x = 11,351.60 × 5,561.56
  4. Step 4: Simplify right side
    8,218.76x = 63,132,604.50
  5. Step 5: Solve for x
    x = 63,132,604.50/8,218.76
  6. Step 6: Final answer
    x = 7,681.52

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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.