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Finding the Fourth Proportional to 6,762.39, 9,330.74 and 3,929.77

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Solution

The fourth proportional to 6,762.39, 9,330.74 and 3,929.77 is: 5,422.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,762.39 : 9,330.74 = 3,929.77 : x
  2. Step 2: Convert to fraction form
    6,762.39/9,330.74 = 3,929.77/x
  3. Step 3: Cross multiply
    6,762.39x = 9,330.74 × 3,929.77
  4. Step 4: Simplify right side
    6,762.39x = 36,667,638.50
  5. Step 5: Solve for x
    x = 36,667,638.50/6,762.39
  6. Step 6: Final answer
    x = 5,422.29

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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.