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Finding the Fourth Proportional to 11,201.90, 15,460.30 and 6,728.10

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Solution

The fourth proportional to 11,201.90, 15,460.30 and 6,728.10 is: 9,285.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,201.90 : 15,460.30 = 6,728.10 : x
  2. Step 2: Convert to fraction form
    11,201.90/15,460.30 = 6,728.10/x
  3. Step 3: Cross multiply
    11,201.90x = 15,460.30 × 6,728.10
  4. Step 4: Simplify right side
    11,201.90x = 104,018,394.86
  5. Step 5: Solve for x
    x = 104,018,394.86/11,201.90
  6. Step 6: Final answer
    x = 9,285.79

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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.