Home / 13,118.80-18,103.41-7,150.34

Finding the Fourth Proportional to 13,118.80, 18,103.41 and 7,150.34

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Solution

The fourth proportional to 13,118.80, 18,103.41 and 7,150.34 is: 9,867.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,118.80 : 18,103.41 = 7,150.34 : x
  2. Step 2: Convert to fraction form
    13,118.80/18,103.41 = 7,150.34/x
  3. Step 3: Cross multiply
    13,118.80x = 18,103.41 × 7,150.34
  4. Step 4: Simplify right side
    13,118.80x = 129,445,536.66
  5. Step 5: Solve for x
    x = 129,445,536.66/13,118.80
  6. Step 6: Final answer
    x = 9,867.18

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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.