Home / 13,145.79-18,141.65-7,481.39

Finding the Fourth Proportional to 13,145.79, 18,141.65 and 7,481.39

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Solution

The fourth proportional to 13,145.79, 18,141.65 and 7,481.39 is: 10,324.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,145.79 : 18,141.65 = 7,481.39 : x
  2. Step 2: Convert to fraction form
    13,145.79/18,141.65 = 7,481.39/x
  3. Step 3: Cross multiply
    13,145.79x = 18,141.65 × 7,481.39
  4. Step 4: Simplify right side
    13,145.79x = 135,724,630.78
  5. Step 5: Solve for x
    x = 135,724,630.78/13,145.79
  6. Step 6: Final answer
    x = 10,324.57

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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.