Home / 12,579.92-17,357.64-6,990.80

Finding the Fourth Proportional to 12,579.92, 17,357.64 and 6,990.80

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Solution

The fourth proportional to 12,579.92, 17,357.64 and 6,990.80 is: 9,645.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,579.92 : 17,357.64 = 6,990.80 : x
  2. Step 2: Convert to fraction form
    12,579.92/17,357.64 = 6,990.80/x
  3. Step 3: Cross multiply
    12,579.92x = 17,357.64 × 6,990.80
  4. Step 4: Simplify right side
    12,579.92x = 121,343,789.71
  5. Step 5: Solve for x
    x = 121,343,789.71/12,579.92
  6. Step 6: Final answer
    x = 9,645.83

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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.