Home / 11,135.78-15,367.49-6,420.06

Finding the Fourth Proportional to 11,135.78, 15,367.49 and 6,420.06

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Solution

The fourth proportional to 11,135.78, 15,367.49 and 6,420.06 is: 8,859.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,135.78 : 15,367.49 = 6,420.06 : x
  2. Step 2: Convert to fraction form
    11,135.78/15,367.49 = 6,420.06/x
  3. Step 3: Cross multiply
    11,135.78x = 15,367.49 × 6,420.06
  4. Step 4: Simplify right side
    11,135.78x = 98,660,207.85
  5. Step 5: Solve for x
    x = 98,660,207.85/11,135.78
  6. Step 6: Final answer
    x = 8,859.75

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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.