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Finding the Fourth Proportional to 20,385.67, 30,582.64 and 7,239.08

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Solution

The fourth proportional to 20,385.67, 30,582.64 and 7,239.08 is: 10,860.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,385.67 : 30,582.64 = 7,239.08 : x
  2. Step 2: Convert to fraction form
    20,385.67/30,582.64 = 7,239.08/x
  3. Step 3: Cross multiply
    20,385.67x = 30,582.64 × 7,239.08
  4. Step 4: Simplify right side
    20,385.67x = 221,390,177.57
  5. Step 5: Solve for x
    x = 221,390,177.57/20,385.67
  6. Step 6: Final answer
    x = 10,860.09

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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.