Home / 12,161.27-16,781.38-7,683.39

Finding the Fourth Proportional to 12,161.27, 16,781.38 and 7,683.39

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Solution

The fourth proportional to 12,161.27, 16,781.38 and 7,683.39 is: 10,602.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,161.27 : 16,781.38 = 7,683.39 : x
  2. Step 2: Convert to fraction form
    12,161.27/16,781.38 = 7,683.39/x
  3. Step 3: Cross multiply
    12,161.27x = 16,781.38 × 7,683.39
  4. Step 4: Simplify right side
    12,161.27x = 128,937,868.07
  5. Step 5: Solve for x
    x = 128,937,868.07/12,161.27
  6. Step 6: Final answer
    x = 10,602.33

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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.