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Finding the Fourth Proportional to 6,762.81, 9,331.96 and 3,929.64

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Solution

The fourth proportional to 6,762.81, 9,331.96 and 3,929.64 is: 5,422.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,762.81 : 9,331.96 = 3,929.64 : x
  2. Step 2: Convert to fraction form
    6,762.81/9,331.96 = 3,929.64/x
  3. Step 3: Cross multiply
    6,762.81x = 9,331.96 × 3,929.64
  4. Step 4: Simplify right side
    6,762.81x = 36,671,243.29
  5. Step 5: Solve for x
    x = 36,671,243.29/6,762.81
  6. Step 6: Final answer
    x = 5,422.49

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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.