Home / 18,405.09-25,395.53-11,691.81

Finding the Fourth Proportional to 18,405.09, 25,395.53 and 11,691.81

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Solution

The fourth proportional to 18,405.09, 25,395.53 and 11,691.81 is: 16,132.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,405.09 : 25,395.53 = 11,691.81 : x
  2. Step 2: Convert to fraction form
    18,405.09/25,395.53 = 11,691.81/x
  3. Step 3: Cross multiply
    18,405.09x = 25,395.53 × 11,691.81
  4. Step 4: Simplify right side
    18,405.09x = 296,919,653.15
  5. Step 5: Solve for x
    x = 296,919,653.15/18,405.09
  6. Step 6: Final answer
    x = 16,132.47

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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.