Home / 11,138.16-15,367.68-6,889.20

Finding the Fourth Proportional to 11,138.16, 15,367.68 and 6,889.20

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Solution

The fourth proportional to 11,138.16, 15,367.68 and 6,889.20 is: 9,505.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,138.16 : 15,367.68 = 6,889.20 : x
  2. Step 2: Convert to fraction form
    11,138.16/15,367.68 = 6,889.20/x
  3. Step 3: Cross multiply
    11,138.16x = 15,367.68 × 6,889.20
  4. Step 4: Simplify right side
    11,138.16x = 105,871,021.06
  5. Step 5: Solve for x
    x = 105,871,021.06/11,138.16
  6. Step 6: Final answer
    x = 9,505.25

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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.