Home / 20,860.92-31,288.02-9,171.96

Finding the Fourth Proportional to 20,860.92, 31,288.02 and 9,171.96

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Solution

The fourth proportional to 20,860.92, 31,288.02 and 9,171.96 is: 13,756.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.92 : 31,288.02 = 9,171.96 : x
  2. Step 2: Convert to fraction form
    20,860.92/31,288.02 = 9,171.96/x
  3. Step 3: Cross multiply
    20,860.92x = 31,288.02 × 9,171.96
  4. Step 4: Simplify right side
    20,860.92x = 286,972,467.92
  5. Step 5: Solve for x
    x = 286,972,467.92/20,860.92
  6. Step 6: Final answer
    x = 13,756.46

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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.