Home / 13,128.54-18,114.57-7,825.11

Finding the Fourth Proportional to 13,128.54, 18,114.57 and 7,825.11

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Solution

The fourth proportional to 13,128.54, 18,114.57 and 7,825.11 is: 10,796.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128.54 : 18,114.57 = 7,825.11 : x
  2. Step 2: Convert to fraction form
    13,128.54/18,114.57 = 7,825.11/x
  3. Step 3: Cross multiply
    13,128.54x = 18,114.57 × 7,825.11
  4. Step 4: Simplify right side
    13,128.54x = 141,748,502.85
  5. Step 5: Solve for x
    x = 141,748,502.85/13,128.54
  6. Step 6: Final answer
    x = 10,796.97

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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.