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Finding the Fourth Proportional to 12,159.73, 18,187.76 and 7,468.21

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Solution

The fourth proportional to 12,159.73, 18,187.76 and 7,468.21 is: 11,170.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,159.73 : 18,187.76 = 7,468.21 : x
  2. Step 2: Convert to fraction form
    12,159.73/18,187.76 = 7,468.21/x
  3. Step 3: Cross multiply
    12,159.73x = 18,187.76 × 7,468.21
  4. Step 4: Simplify right side
    12,159.73x = 135,829,973.77
  5. Step 5: Solve for x
    x = 135,829,973.77/12,159.73
  6. Step 6: Final answer
    x = 11,170.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.