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Finding the Fourth Proportional to 13,408.68, 18,506.04 and 12,818.04

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Solution

The fourth proportional to 13,408.68, 18,506.04 and 12,818.04 is: 17,690.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,408.68 : 18,506.04 = 12,818.04 : x
  2. Step 2: Convert to fraction form
    13,408.68/18,506.04 = 12,818.04/x
  3. Step 3: Cross multiply
    13,408.68x = 18,506.04 × 12,818.04
  4. Step 4: Simplify right side
    13,408.68x = 237,211,160.96
  5. Step 5: Solve for x
    x = 237,211,160.96/13,408.68
  6. Step 6: Final answer
    x = 17,690.87

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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.