Home / 13,143.68-18,138.69-7,175.74

Finding the Fourth Proportional to 13,143.68, 18,138.69 and 7,175.74

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Solution

The fourth proportional to 13,143.68, 18,138.69 and 7,175.74 is: 9,902.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,143.68 : 18,138.69 = 7,175.74 : x
  2. Step 2: Convert to fraction form
    13,143.68/18,138.69 = 7,175.74/x
  3. Step 3: Cross multiply
    13,143.68x = 18,138.69 × 7,175.74
  4. Step 4: Simplify right side
    13,143.68x = 130,158,396.81
  5. Step 5: Solve for x
    x = 130,158,396.81/13,143.68
  6. Step 6: Final answer
    x = 9,902.74

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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.