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Finding the Fourth Proportional to 12,171.95, 18,250.07 and 4,777.16

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Solution

The fourth proportional to 12,171.95, 18,250.07 and 4,777.16 is: 7,162.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,171.95 : 18,250.07 = 4,777.16 : x
  2. Step 2: Convert to fraction form
    12,171.95/18,250.07 = 4,777.16/x
  3. Step 3: Cross multiply
    12,171.95x = 18,250.07 × 4,777.16
  4. Step 4: Simplify right side
    12,171.95x = 87,183,389.27
  5. Step 5: Solve for x
    x = 87,183,389.27/12,171.95
  6. Step 6: Final answer
    x = 7,162.65

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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.