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Finding the Fourth Proportional to 11,076.70, 16,627.20 and 6,921.40

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Solution

The fourth proportional to 11,076.70, 16,627.20 and 6,921.40 is: 10,389.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,076.70 : 16,627.20 = 6,921.40 : x
  2. Step 2: Convert to fraction form
    11,076.70/16,627.20 = 6,921.40/x
  3. Step 3: Cross multiply
    11,076.70x = 16,627.20 × 6,921.40
  4. Step 4: Simplify right side
    11,076.70x = 115,083,502.08
  5. Step 5: Solve for x
    x = 115,083,502.08/11,076.70
  6. Step 6: Final answer
    x = 10,389.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.