Home / 11,691.93-16,135.29-6,386.78

Finding the Fourth Proportional to 11,691.93, 16,135.29 and 6,386.78

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Solution

The fourth proportional to 11,691.93, 16,135.29 and 6,386.78 is: 8,813.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,691.93 : 16,135.29 = 6,386.78 : x
  2. Step 2: Convert to fraction form
    11,691.93/16,135.29 = 6,386.78/x
  3. Step 3: Cross multiply
    11,691.93x = 16,135.29 × 6,386.78
  4. Step 4: Simplify right side
    11,691.93x = 103,052,466.79
  5. Step 5: Solve for x
    x = 103,052,466.79/11,691.93
  6. Step 6: Final answer
    x = 8,813.98

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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.