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Finding the Fourth Proportional to 9,323.20, 12,866 and 5,131.45

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Solution

The fourth proportional to 9,323.20, 12,866 and 5,131.45 is: 7,081.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,323.20 : 12,866 = 5,131.45 : x
  2. Step 2: Convert to fraction form
    9,323.20/12,866 = 5,131.45/x
  3. Step 3: Cross multiply
    9,323.20x = 12,866 × 5,131.45
  4. Step 4: Simplify right side
    9,323.20x = 66,021,235.70
  5. Step 5: Solve for x
    x = 66,021,235.70/9,323.20
  6. Step 6: Final answer
    x = 7,081.39

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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.