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Finding the Fourth Proportional to 13,392.74, 18,487.86 and 9,375.34

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Solution

The fourth proportional to 13,392.74, 18,487.86 and 9,375.34 is: 12,942.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,392.74 : 18,487.86 = 9,375.34 : x
  2. Step 2: Convert to fraction form
    13,392.74/18,487.86 = 9,375.34/x
  3. Step 3: Cross multiply
    13,392.74x = 18,487.86 × 9,375.34
  4. Step 4: Simplify right side
    13,392.74x = 173,330,019.59
  5. Step 5: Solve for x
    x = 173,330,019.59/13,392.74
  6. Step 6: Final answer
    x = 12,942.09

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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.