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Finding the Fourth Proportional to 12,157.98, 18,236.96 and 9,388.68

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Solution

The fourth proportional to 12,157.98, 18,236.96 and 9,388.68 is: 14,083.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,157.98 : 18,236.96 = 9,388.68 : x
  2. Step 2: Convert to fraction form
    12,157.98/18,236.96 = 9,388.68/x
  3. Step 3: Cross multiply
    12,157.98x = 18,236.96 × 9,388.68
  4. Step 4: Simplify right side
    12,157.98x = 171,220,981.61
  5. Step 5: Solve for x
    x = 171,220,981.61/12,157.98
  6. Step 6: Final answer
    x = 14,083.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.