Home / 13,138.63-18,131.36-7,170.43

Finding the Fourth Proportional to 13,138.63, 18,131.36 and 7,170.43

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Solution

The fourth proportional to 13,138.63, 18,131.36 and 7,170.43 is: 9,895.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,138.63 : 18,131.36 = 7,170.43 : x
  2. Step 2: Convert to fraction form
    13,138.63/18,131.36 = 7,170.43/x
  3. Step 3: Cross multiply
    13,138.63x = 18,131.36 × 7,170.43
  4. Step 4: Simplify right side
    13,138.63x = 130,009,599.73
  5. Step 5: Solve for x
    x = 130,009,599.73/13,138.63
  6. Step 6: Final answer
    x = 9,895.22

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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.