Home / 13,143.89-18,138.05-7,175.55

Finding the Fourth Proportional to 13,143.89, 18,138.05 and 7,175.55

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Solution

The fourth proportional to 13,143.89, 18,138.05 and 7,175.55 is: 9,901.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,143.89 : 18,138.05 = 7,175.55 : x
  2. Step 2: Convert to fraction form
    13,143.89/18,138.05 = 7,175.55/x
  3. Step 3: Cross multiply
    13,143.89x = 18,138.05 × 7,175.55
  4. Step 4: Simplify right side
    13,143.89x = 130,150,484.68
  5. Step 5: Solve for x
    x = 130,150,484.68/13,143.89
  6. Step 6: Final answer
    x = 9,901.98

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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.