Home / 13,143.60-18,138.43-7,175.52

Finding the Fourth Proportional to 13,143.60, 18,138.43 and 7,175.52

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Solution

The fourth proportional to 13,143.60, 18,138.43 and 7,175.52 is: 9,902.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,143.60 : 18,138.43 = 7,175.52 : x
  2. Step 2: Convert to fraction form
    13,143.60/18,138.43 = 7,175.52/x
  3. Step 3: Cross multiply
    13,143.60x = 18,138.43 × 7,175.52
  4. Step 4: Simplify right side
    13,143.60x = 130,152,649.29
  5. Step 5: Solve for x
    x = 130,152,649.29/13,143.60
  6. Step 6: Final answer
    x = 9,902.36

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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.