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Finding the Fourth Proportional to 12,118.95, 18,158.85 and 10,174.95

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Solution

The fourth proportional to 12,118.95, 18,158.85 and 10,174.95 is: 15,245.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,118.95 : 18,158.85 = 10,174.95 : x
  2. Step 2: Convert to fraction form
    12,118.95/18,158.85 = 10,174.95/x
  3. Step 3: Cross multiply
    12,118.95x = 18,158.85 × 10,174.95
  4. Step 4: Simplify right side
    12,118.95x = 184,765,390.81
  5. Step 5: Solve for x
    x = 184,765,390.81/12,118.95
  6. Step 6: Final answer
    x = 15,245.99

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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.