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Finding the Fourth Proportional to 12,505.70, 18,751.61 and 5,115.34

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Solution

The fourth proportional to 12,505.70, 18,751.61 and 5,115.34 is: 7,670.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,505.70 : 18,751.61 = 5,115.34 : x
  2. Step 2: Convert to fraction form
    12,505.70/18,751.61 = 5,115.34/x
  3. Step 3: Cross multiply
    12,505.70x = 18,751.61 × 5,115.34
  4. Step 4: Simplify right side
    12,505.70x = 95,920,896.93
  5. Step 5: Solve for x
    x = 95,920,896.93/12,505.70
  6. Step 6: Final answer
    x = 7,670.18

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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.