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Finding the Fourth Proportional to 13,626.70, 18,799.98 and 8,913.70

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Solution

The fourth proportional to 13,626.70, 18,799.98 and 8,913.70 is: 12,297.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,626.70 : 18,799.98 = 8,913.70 : x
  2. Step 2: Convert to fraction form
    13,626.70/18,799.98 = 8,913.70/x
  3. Step 3: Cross multiply
    13,626.70x = 18,799.98 × 8,913.70
  4. Step 4: Simplify right side
    13,626.70x = 167,577,381.73
  5. Step 5: Solve for x
    x = 167,577,381.73/13,626.70
  6. Step 6: Final answer
    x = 12,297.72

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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.