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Finding the Fourth Proportional to 20,220.91, 30,341.01 and 9,131.00

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Solution

The fourth proportional to 20,220.91, 30,341.01 and 9,131.00 is: 13,700.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,220.91 : 30,341.01 = 9,131.00 : x
  2. Step 2: Convert to fraction form
    20,220.91/30,341.01 = 9,131.00/x
  3. Step 3: Cross multiply
    20,220.91x = 30,341.01 × 9,131.00
  4. Step 4: Simplify right side
    20,220.91x = 277,043,644.85
  5. Step 5: Solve for x
    x = 277,043,644.85/20,220.91
  6. Step 6: Final answer
    x = 13,700.85

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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.