Home / 12,140.40-18,197.62-8,667.12

Finding the Fourth Proportional to 12,140.40, 18,197.62 and 8,667.12

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Solution

The fourth proportional to 12,140.40, 18,197.62 and 8,667.12 is: 12,991.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,140.40 : 18,197.62 = 8,667.12 : x
  2. Step 2: Convert to fraction form
    12,140.40/18,197.62 = 8,667.12/x
  3. Step 3: Cross multiply
    12,140.40x = 18,197.62 × 8,667.12
  4. Step 4: Simplify right side
    12,140.40x = 157,720,956.25
  5. Step 5: Solve for x
    x = 157,720,956.25/12,140.40
  6. Step 6: Final answer
    x = 12,991.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.