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Finding the Fourth Proportional to 8,480.86, 11,703.31 and 5,123.09

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Solution

The fourth proportional to 8,480.86, 11,703.31 and 5,123.09 is: 7,069.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,480.86 : 11,703.31 = 5,123.09 : x
  2. Step 2: Convert to fraction form
    8,480.86/11,703.31 = 5,123.09/x
  3. Step 3: Cross multiply
    8,480.86x = 11,703.31 × 5,123.09
  4. Step 4: Simplify right side
    8,480.86x = 59,957,122.65
  5. Step 5: Solve for x
    x = 59,957,122.65/8,480.86
  6. Step 6: Final answer
    x = 7,069.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.