Home / 21,270.50-31,910.50-6,480.57

Finding the Fourth Proportional to 21,270.50, 31,910.50 and 6,480.57

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Solution

The fourth proportional to 21,270.50, 31,910.50 and 6,480.57 is: 9,722.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,270.50 : 31,910.50 = 6,480.57 : x
  2. Step 2: Convert to fraction form
    21,270.50/31,910.50 = 6,480.57/x
  3. Step 3: Cross multiply
    21,270.50x = 31,910.50 × 6,480.57
  4. Step 4: Simplify right side
    21,270.50x = 206,798,228.99
  5. Step 5: Solve for x
    x = 206,798,228.99/21,270.50
  6. Step 6: Final answer
    x = 9,722.30

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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.