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Finding the Fourth Proportional to 8,237.80, 12,356.70 and 2,081.80

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Solution

The fourth proportional to 8,237.80, 12,356.70 and 2,081.80 is: 3,122.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,237.80 : 12,356.70 = 2,081.80 : x
  2. Step 2: Convert to fraction form
    8,237.80/12,356.70 = 2,081.80/x
  3. Step 3: Cross multiply
    8,237.80x = 12,356.70 × 2,081.80
  4. Step 4: Simplify right side
    8,237.80x = 25,724,178.06
  5. Step 5: Solve for x
    x = 25,724,178.06/8,237.80
  6. Step 6: Final answer
    x = 3,122.70

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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.