Home / 11,121.55-15,347.70-6,645.08

Finding the Fourth Proportional to 11,121.55, 15,347.70 and 6,645.08

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Solution

The fourth proportional to 11,121.55, 15,347.70 and 6,645.08 is: 9,170.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,121.55 : 15,347.70 = 6,645.08 : x
  2. Step 2: Convert to fraction form
    11,121.55/15,347.70 = 6,645.08/x
  3. Step 3: Cross multiply
    11,121.55x = 15,347.70 × 6,645.08
  4. Step 4: Simplify right side
    11,121.55x = 101,986,732.69
  5. Step 5: Solve for x
    x = 101,986,732.69/11,121.55
  6. Step 6: Final answer
    x = 9,170.19

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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.