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Finding the Fourth Proportional to 12,695.60, 17,503.62 and 8,211.44

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Solution

The fourth proportional to 12,695.60, 17,503.62 and 8,211.44 is: 11,321.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,695.60 : 17,503.62 = 8,211.44 : x
  2. Step 2: Convert to fraction form
    12,695.60/17,503.62 = 8,211.44/x
  3. Step 3: Cross multiply
    12,695.60x = 17,503.62 × 8,211.44
  4. Step 4: Simplify right side
    12,695.60x = 143,729,925.41
  5. Step 5: Solve for x
    x = 143,729,925.41/12,695.60
  6. Step 6: Final answer
    x = 11,321.24

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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.