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Finding the Fourth Proportional to 12,396.60, 18,687.48 and 11,345.76

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Solution

The fourth proportional to 12,396.60, 18,687.48 and 11,345.76 is: 17,103.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,396.60 : 18,687.48 = 11,345.76 : x
  2. Step 2: Convert to fraction form
    12,396.60/18,687.48 = 11,345.76/x
  3. Step 3: Cross multiply
    12,396.60x = 18,687.48 × 11,345.76
  4. Step 4: Simplify right side
    12,396.60x = 212,023,663.08
  5. Step 5: Solve for x
    x = 212,023,663.08/12,396.60
  6. Step 6: Final answer
    x = 17,103.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.