Home / 9,406.92-12,979.74-5,428.20

Finding the Fourth Proportional to 9,406.92, 12,979.74 and 5,428.20

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Solution

The fourth proportional to 9,406.92, 12,979.74 and 5,428.20 is: 7,489.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,406.92 : 12,979.74 = 5,428.20 : x
  2. Step 2: Convert to fraction form
    9,406.92/12,979.74 = 5,428.20/x
  3. Step 3: Cross multiply
    9,406.92x = 12,979.74 × 5,428.20
  4. Step 4: Simplify right side
    9,406.92x = 70,456,624.67
  5. Step 5: Solve for x
    x = 70,456,624.67/9,406.92
  6. Step 6: Final answer
    x = 7,489.87

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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.