Home / 20,847.20-31,270.80-20,717.60

Finding the Fourth Proportional to 20,847.20, 31,270.80 and 20,717.60

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Solution

The fourth proportional to 20,847.20, 31,270.80 and 20,717.60 is: 31,076.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,847.20 : 31,270.80 = 20,717.60 : x
  2. Step 2: Convert to fraction form
    20,847.20/31,270.80 = 20,717.60/x
  3. Step 3: Cross multiply
    20,847.20x = 31,270.80 × 20,717.60
  4. Step 4: Simplify right side
    20,847.20x = 647,855,926.08
  5. Step 5: Solve for x
    x = 647,855,926.08/20,847.20
  6. Step 6: Final answer
    x = 31,076.40

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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.