Home / 11,921.57-16,452.87-6,618.09

Finding the Fourth Proportional to 11,921.57, 16,452.87 and 6,618.09

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Solution

The fourth proportional to 11,921.57, 16,452.87 and 6,618.09 is: 9,133.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,921.57 : 16,452.87 = 6,618.09 : x
  2. Step 2: Convert to fraction form
    11,921.57/16,452.87 = 6,618.09/x
  3. Step 3: Cross multiply
    11,921.57x = 16,452.87 × 6,618.09
  4. Step 4: Simplify right side
    11,921.57x = 108,886,574.42
  5. Step 5: Solve for x
    x = 108,886,574.42/11,921.57
  6. Step 6: Final answer
    x = 9,133.58

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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.