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Finding the Fourth Proportional to 13,703.52, 18,905.80 and 8,994.20

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Solution

The fourth proportional to 13,703.52, 18,905.80 and 8,994.20 is: 12,408.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,703.52 : 18,905.80 = 8,994.20 : x
  2. Step 2: Convert to fraction form
    13,703.52/18,905.80 = 8,994.20/x
  3. Step 3: Cross multiply
    13,703.52x = 18,905.80 × 8,994.20
  4. Step 4: Simplify right side
    13,703.52x = 170,042,546.36
  5. Step 5: Solve for x
    x = 170,042,546.36/13,703.52
  6. Step 6: Final answer
    x = 12,408.68

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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.