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Finding the Fourth Proportional to 20,006.70, 30,010.05 and 6,859.20

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Solution

The fourth proportional to 20,006.70, 30,010.05 and 6,859.20 is: 10,288.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,006.70 : 30,010.05 = 6,859.20 : x
  2. Step 2: Convert to fraction form
    20,006.70/30,010.05 = 6,859.20/x
  3. Step 3: Cross multiply
    20,006.70x = 30,010.05 × 6,859.20
  4. Step 4: Simplify right side
    20,006.70x = 205,844,934.96
  5. Step 5: Solve for x
    x = 205,844,934.96/20,006.70
  6. Step 6: Final answer
    x = 10,288.80

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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.