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Finding the Fourth Proportional to 8,128.04, 11,191.64 and 6,930.32

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Solution

The fourth proportional to 8,128.04, 11,191.64 and 6,930.32 is: 9,542.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128.04 : 11,191.64 = 6,930.32 : x
  2. Step 2: Convert to fraction form
    8,128.04/11,191.64 = 6,930.32/x
  3. Step 3: Cross multiply
    8,128.04x = 11,191.64 × 6,930.32
  4. Step 4: Simplify right side
    8,128.04x = 77,561,646.52
  5. Step 5: Solve for x
    x = 77,561,646.52/8,128.04
  6. Step 6: Final answer
    x = 9,542.48

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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.