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Finding the Fourth Proportional to 11,128.02, 15,356 and 6,347.30

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Solution

The fourth proportional to 11,128.02, 15,356 and 6,347.30 is: 8,758.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,128.02 : 15,356 = 6,347.30 : x
  2. Step 2: Convert to fraction form
    11,128.02/15,356 = 6,347.30/x
  3. Step 3: Cross multiply
    11,128.02x = 15,356 × 6,347.30
  4. Step 4: Simplify right side
    11,128.02x = 97,469,138.80
  5. Step 5: Solve for x
    x = 97,469,138.80/11,128.02
  6. Step 6: Final answer
    x = 8,758.89

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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.