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Finding the Fourth Proportional to 8,113.90, 11,197.16 and 4,387.90

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Solution

The fourth proportional to 8,113.90, 11,197.16 and 4,387.90 is: 6,055.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,113.90 : 11,197.16 = 4,387.90 : x
  2. Step 2: Convert to fraction form
    8,113.90/11,197.16 = 4,387.90/x
  3. Step 3: Cross multiply
    8,113.90x = 11,197.16 × 4,387.90
  4. Step 4: Simplify right side
    8,113.90x = 49,132,018.36
  5. Step 5: Solve for x
    x = 49,132,018.36/8,113.90
  6. Step 6: Final answer
    x = 6,055.29

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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.