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Finding the Fourth Proportional to 9,129.90, 13,695.30 and 4,755.90

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Solution

The fourth proportional to 9,129.90, 13,695.30 and 4,755.90 is: 7,134.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,129.90 : 13,695.30 = 4,755.90 : x
  2. Step 2: Convert to fraction form
    9,129.90/13,695.30 = 4,755.90/x
  3. Step 3: Cross multiply
    9,129.90x = 13,695.30 × 4,755.90
  4. Step 4: Simplify right side
    9,129.90x = 65,133,477.27
  5. Step 5: Solve for x
    x = 65,133,477.27/9,129.90
  6. Step 6: Final answer
    x = 7,134.08

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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.