Home / 11,115.55-15,339.71-6,638.46

Finding the Fourth Proportional to 11,115.55, 15,339.71 and 6,638.46

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Solution

The fourth proportional to 11,115.55, 15,339.71 and 6,638.46 is: 9,161.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,115.55 : 15,339.71 = 6,638.46 : x
  2. Step 2: Convert to fraction form
    11,115.55/15,339.71 = 6,638.46/x
  3. Step 3: Cross multiply
    11,115.55x = 15,339.71 × 6,638.46
  4. Step 4: Simplify right side
    11,115.55x = 101,832,018.05
  5. Step 5: Solve for x
    x = 101,832,018.05/11,115.55
  6. Step 6: Final answer
    x = 9,161.22

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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.