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Finding the Fourth Proportional to 12,157.95, 18,236.93 and 9,388.66

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Solution

The fourth proportional to 12,157.95, 18,236.93 and 9,388.66 is: 14,082.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,157.95 : 18,236.93 = 9,388.66 : x
  2. Step 2: Convert to fraction form
    12,157.95/18,236.93 = 9,388.66/x
  3. Step 3: Cross multiply
    12,157.95x = 18,236.93 × 9,388.66
  4. Step 4: Simplify right side
    12,157.95x = 171,220,288.27
  5. Step 5: Solve for x
    x = 171,220,288.27/12,157.95
  6. Step 6: Final answer
    x = 14,082.99

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Similar ratio
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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.