Home / 20,940.85-31,173.80-20,829.97

Finding the Fourth Proportional to 20,940.85, 31,173.80 and 20,829.97

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Solution

The fourth proportional to 20,940.85, 31,173.80 and 20,829.97 is: 31,008.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.85 : 31,173.80 = 20,829.97 : x
  2. Step 2: Convert to fraction form
    20,940.85/31,173.80 = 20,829.97/x
  3. Step 3: Cross multiply
    20,940.85x = 31,173.80 × 20,829.97
  4. Step 4: Simplify right side
    20,940.85x = 649,349,318.79
  5. Step 5: Solve for x
    x = 649,349,318.79/20,940.85
  6. Step 6: Final answer
    x = 31,008.74

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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.