Home / 8,667.45-11,921.40-7,144.29

Finding the Fourth Proportional to 8,667.45, 11,921.40 and 7,144.29

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Solution

The fourth proportional to 8,667.45, 11,921.40 and 7,144.29 is: 9,826.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,667.45 : 11,921.40 = 7,144.29 : x
  2. Step 2: Convert to fraction form
    8,667.45/11,921.40 = 7,144.29/x
  3. Step 3: Cross multiply
    8,667.45x = 11,921.40 × 7,144.29
  4. Step 4: Simplify right side
    8,667.45x = 85,169,938.81
  5. Step 5: Solve for x
    x = 85,169,938.81/8,667.45
  6. Step 6: Final answer
    x = 9,826.41

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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.