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Finding the Fourth Proportional to 12,505.16, 18,770.95 and 12,222.80

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Solution

The fourth proportional to 12,505.16, 18,770.95 and 12,222.80 is: 18,347.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,505.16 : 18,770.95 = 12,222.80 : x
  2. Step 2: Convert to fraction form
    12,505.16/18,770.95 = 12,222.80/x
  3. Step 3: Cross multiply
    12,505.16x = 18,770.95 × 12,222.80
  4. Step 4: Simplify right side
    12,505.16x = 229,433,443.25
  5. Step 5: Solve for x
    x = 229,433,443.25/12,505.16
  6. Step 6: Final answer
    x = 18,347.11

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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.