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Finding the Fourth Proportional to 11,291, 15,581.34 and 6,818.44

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Solution

The fourth proportional to 11,291, 15,581.34 and 6,818.44 is: 9,409.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,291 : 15,581.34 = 6,818.44 : x
  2. Step 2: Convert to fraction form
    11,291/15,581.34 = 6,818.44/x
  3. Step 3: Cross multiply
    11,291x = 15,581.34 × 6,818.44
  4. Step 4: Simplify right side
    11,291x = 106,240,431.91
  5. Step 5: Solve for x
    x = 106,240,431.91/11,291
  6. Step 6: Final answer
    x = 9,409.30

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.