Home / 13,143.57-18,138.45-7,175.21

Finding the Fourth Proportional to 13,143.57, 18,138.45 and 7,175.21

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Solution

The fourth proportional to 13,143.57, 18,138.45 and 7,175.21 is: 9,901.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,143.57 : 18,138.45 = 7,175.21 : x
  2. Step 2: Convert to fraction form
    13,143.57/18,138.45 = 7,175.21/x
  3. Step 3: Cross multiply
    13,143.57x = 18,138.45 × 7,175.21
  4. Step 4: Simplify right side
    13,143.57x = 130,147,097.13
  5. Step 5: Solve for x
    x = 130,147,097.13/13,143.57
  6. Step 6: Final answer
    x = 9,901.96

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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.