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Finding the Fourth Proportional to 6,761.40, 9,330.51 and 3,929.01

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Solution

The fourth proportional to 6,761.40, 9,330.51 and 3,929.01 is: 5,421.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,761.40 : 9,330.51 = 3,929.01 : x
  2. Step 2: Convert to fraction form
    6,761.40/9,330.51 = 3,929.01/x
  3. Step 3: Cross multiply
    6,761.40x = 9,330.51 × 3,929.01
  4. Step 4: Simplify right side
    6,761.40x = 36,659,667.10
  5. Step 5: Solve for x
    x = 36,659,667.10/6,761.40
  6. Step 6: Final answer
    x = 5,421.90

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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.