Home / 13,138.22-18,130.55-7,169.73

Finding the Fourth Proportional to 13,138.22, 18,130.55 and 7,169.73

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Solution

The fourth proportional to 13,138.22, 18,130.55 and 7,169.73 is: 9,894.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,138.22 : 18,130.55 = 7,169.73 : x
  2. Step 2: Convert to fraction form
    13,138.22/18,130.55 = 7,169.73/x
  3. Step 3: Cross multiply
    13,138.22x = 18,130.55 × 7,169.73
  4. Step 4: Simplify right side
    13,138.22x = 129,991,112.40
  5. Step 5: Solve for x
    x = 129,991,112.40/13,138.22
  6. Step 6: Final answer
    x = 9,894.12

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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.