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Finding the Fourth Proportional to 12,695.22, 17,513.52 and 8,220.42

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Solution

The fourth proportional to 12,695.22, 17,513.52 and 8,220.42 is: 11,340.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,695.22 : 17,513.52 = 8,220.42 : x
  2. Step 2: Convert to fraction form
    12,695.22/17,513.52 = 8,220.42/x
  3. Step 3: Cross multiply
    12,695.22x = 17,513.52 × 8,220.42
  4. Step 4: Simplify right side
    12,695.22x = 143,968,490.08
  5. Step 5: Solve for x
    x = 143,968,490.08/12,695.22
  6. Step 6: Final answer
    x = 11,340.37

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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.