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Finding the Fourth Proportional to 20,013.60, 30,021.02 and 6,865.79

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Solution

The fourth proportional to 20,013.60, 30,021.02 and 6,865.79 is: 10,298.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,013.60 : 30,021.02 = 6,865.79 : x
  2. Step 2: Convert to fraction form
    20,013.60/30,021.02 = 6,865.79/x
  3. Step 3: Cross multiply
    20,013.60x = 30,021.02 × 6,865.79
  4. Step 4: Simplify right side
    20,013.60x = 206,117,834.47
  5. Step 5: Solve for x
    x = 206,117,834.47/20,013.60
  6. Step 6: Final answer
    x = 10,298.89

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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.