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Finding the Fourth Proportional to 18,151.85, 27,211.37 and 12,607.80

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Solution

The fourth proportional to 18,151.85, 27,211.37 and 12,607.80 is: 18,900.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,151.85 : 27,211.37 = 12,607.80 : x
  2. Step 2: Convert to fraction form
    18,151.85/27,211.37 = 12,607.80/x
  3. Step 3: Cross multiply
    18,151.85x = 27,211.37 × 12,607.80
  4. Step 4: Simplify right side
    18,151.85x = 343,075,447.65
  5. Step 5: Solve for x
    x = 343,075,447.65/18,151.85
  6. Step 6: Final answer
    x = 18,900.31

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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.