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Finding the Fourth Proportional to 12,408.53, 18,705.80 and 11,583.68

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Solution

The fourth proportional to 12,408.53, 18,705.80 and 11,583.68 is: 17,462.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,408.53 : 18,705.80 = 11,583.68 : x
  2. Step 2: Convert to fraction form
    12,408.53/18,705.80 = 11,583.68/x
  3. Step 3: Cross multiply
    12,408.53x = 18,705.80 × 11,583.68
  4. Step 4: Simplify right side
    12,408.53x = 216,682,001.34
  5. Step 5: Solve for x
    x = 216,682,001.34/12,408.53
  6. Step 6: Final answer
    x = 17,462.34

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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.