Home / 20,962.80-31,480.65-11,121.30

Finding the Fourth Proportional to 20,962.80, 31,480.65 and 11,121.30

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Solution

The fourth proportional to 20,962.80, 31,480.65 and 11,121.30 is: 16,701.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,962.80 : 31,480.65 = 11,121.30 : x
  2. Step 2: Convert to fraction form
    20,962.80/31,480.65 = 11,121.30/x
  3. Step 3: Cross multiply
    20,962.80x = 31,480.65 × 11,121.30
  4. Step 4: Simplify right side
    20,962.80x = 350,105,752.85
  5. Step 5: Solve for x
    x = 350,105,752.85/20,962.80
  6. Step 6: Final answer
    x = 16,701.29

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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.