Home / 20,667.73-31,016.29-8,190.45

Finding the Fourth Proportional to 20,667.73, 31,016.29 and 8,190.45

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Solution

The fourth proportional to 20,667.73, 31,016.29 and 8,190.45 is: 12,291.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,667.73 : 31,016.29 = 8,190.45 : x
  2. Step 2: Convert to fraction form
    20,667.73/31,016.29 = 8,190.45/x
  3. Step 3: Cross multiply
    20,667.73x = 31,016.29 × 8,190.45
  4. Step 4: Simplify right side
    20,667.73x = 254,037,528.37
  5. Step 5: Solve for x
    x = 254,037,528.37/20,667.73
  6. Step 6: Final answer
    x = 12,291.51

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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.