Home / 20,966.85-31,212.54-20,855.97

Finding the Fourth Proportional to 20,966.85, 31,212.54 and 20,855.97

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Solution

The fourth proportional to 20,966.85, 31,212.54 and 20,855.97 is: 31,047.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,966.85 : 31,212.54 = 20,855.97 : x
  2. Step 2: Convert to fraction form
    20,966.85/31,212.54 = 20,855.97/x
  3. Step 3: Cross multiply
    20,966.85x = 31,212.54 × 20,855.97
  4. Step 4: Simplify right side
    20,966.85x = 650,967,797.86
  5. Step 5: Solve for x
    x = 650,967,797.86/20,966.85
  6. Step 6: Final answer
    x = 31,047.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.