Home / 13,118.49-18,103.90-7,150.55

Finding the Fourth Proportional to 13,118.49, 18,103.90 and 7,150.55

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Solution

The fourth proportional to 13,118.49, 18,103.90 and 7,150.55 is: 9,867.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,118.49 : 18,103.90 = 7,150.55 : x
  2. Step 2: Convert to fraction form
    13,118.49/18,103.90 = 7,150.55/x
  3. Step 3: Cross multiply
    13,118.49x = 18,103.90 × 7,150.55
  4. Step 4: Simplify right side
    13,118.49x = 129,452,751.63
  5. Step 5: Solve for x
    x = 129,452,751.63/13,118.49
  6. Step 6: Final answer
    x = 9,867.96

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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.