Home / 13,143.67-18,138.51-7,175.56

Finding the Fourth Proportional to 13,143.67, 18,138.51 and 7,175.56

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Solution

The fourth proportional to 13,143.67, 18,138.51 and 7,175.56 is: 9,902.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,143.67 : 18,138.51 = 7,175.56 : x
  2. Step 2: Convert to fraction form
    13,143.67/18,138.51 = 7,175.56/x
  3. Step 3: Cross multiply
    13,143.67x = 18,138.51 × 7,175.56
  4. Step 4: Simplify right side
    13,143.67x = 130,153,986.31
  5. Step 5: Solve for x
    x = 130,153,986.31/13,143.67
  6. Step 6: Final answer
    x = 9,902.41

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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.