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Finding the Fourth Proportional to 13,134.60, 18,125.28 and 7,469.28

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Solution

The fourth proportional to 13,134.60, 18,125.28 and 7,469.28 is: 10,307.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,134.60 : 18,125.28 = 7,469.28 : x
  2. Step 2: Convert to fraction form
    13,134.60/18,125.28 = 7,469.28/x
  3. Step 3: Cross multiply
    13,134.60x = 18,125.28 × 7,469.28
  4. Step 4: Simplify right side
    13,134.60x = 135,382,791.40
  5. Step 5: Solve for x
    x = 135,382,791.40/13,134.60
  6. Step 6: Final answer
    x = 10,307.34

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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.