Home / 13,284.66-18,317.62-9,921.79

Finding the Fourth Proportional to 13,284.66, 18,317.62 and 9,921.79

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Solution

The fourth proportional to 13,284.66, 18,317.62 and 9,921.79 is: 13,680.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,284.66 : 18,317.62 = 9,921.79 : x
  2. Step 2: Convert to fraction form
    13,284.66/18,317.62 = 9,921.79/x
  3. Step 3: Cross multiply
    13,284.66x = 18,317.62 × 9,921.79
  4. Step 4: Simplify right side
    13,284.66x = 181,743,586.33
  5. Step 5: Solve for x
    x = 181,743,586.33/13,284.66
  6. Step 6: Final answer
    x = 13,680.71

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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.