Home / 11,691.27-16,128.80-6,972.81

Finding the Fourth Proportional to 11,691.27, 16,128.80 and 6,972.81

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Solution

The fourth proportional to 11,691.27, 16,128.80 and 6,972.81 is: 9,619.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,691.27 : 16,128.80 = 6,972.81 : x
  2. Step 2: Convert to fraction form
    11,691.27/16,128.80 = 6,972.81/x
  3. Step 3: Cross multiply
    11,691.27x = 16,128.80 × 6,972.81
  4. Step 4: Simplify right side
    11,691.27x = 112,463,057.93
  5. Step 5: Solve for x
    x = 112,463,057.93/11,691.27
  6. Step 6: Final answer
    x = 9,619.40

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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.