Home / 13,143.60-18,138.54-7,175.64

Finding the Fourth Proportional to 13,143.60, 18,138.54 and 7,175.64

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Solution

The fourth proportional to 13,143.60, 18,138.54 and 7,175.64 is: 9,902.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,143.60 : 18,138.54 = 7,175.64 : x
  2. Step 2: Convert to fraction form
    13,143.60/18,138.54 = 7,175.64/x
  3. Step 3: Cross multiply
    13,143.60x = 18,138.54 × 7,175.64
  4. Step 4: Simplify right side
    13,143.60x = 130,155,633.17
  5. Step 5: Solve for x
    x = 130,155,633.17/13,143.60
  6. Step 6: Final answer
    x = 9,902.59

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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.