Home / 6,471.72-9,707.78-2,089.62

Finding the Fourth Proportional to 6,471.72, 9,707.78 and 2,089.62

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Solution

The fourth proportional to 6,471.72, 9,707.78 and 2,089.62 is: 3,134.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,471.72 : 9,707.78 = 2,089.62 : x
  2. Step 2: Convert to fraction form
    6,471.72/9,707.78 = 2,089.62/x
  3. Step 3: Cross multiply
    6,471.72x = 9,707.78 × 2,089.62
  4. Step 4: Simplify right side
    6,471.72x = 20,285,576.47
  5. Step 5: Solve for x
    x = 20,285,576.47/6,471.72
  6. Step 6: Final answer
    x = 3,134.50

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Double scale
Find fourth proportional to 6,472.72, 9,709.28 and 2,090.62
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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.