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Finding the Fourth Proportional to 7,081.50, 9,772.47 and 3,937.77

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Solution

The fourth proportional to 7,081.50, 9,772.47 and 3,937.77 is: 5,434.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,081.50 : 9,772.47 = 3,937.77 : x
  2. Step 2: Convert to fraction form
    7,081.50/9,772.47 = 3,937.77/x
  3. Step 3: Cross multiply
    7,081.50x = 9,772.47 × 3,937.77
  4. Step 4: Simplify right side
    7,081.50x = 38,481,739.19
  5. Step 5: Solve for x
    x = 38,481,739.19/7,081.50
  6. Step 6: Final answer
    x = 5,434.12

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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.