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Finding the Fourth Proportional to 20,215.90, 30,329.52 and 20,215.90

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Solution

The fourth proportional to 20,215.90, 30,329.52 and 20,215.90 is: 30,329.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,215.90 : 30,329.52 = 20,215.90 : x
  2. Step 2: Convert to fraction form
    20,215.90/30,329.52 = 20,215.90/x
  3. Step 3: Cross multiply
    20,215.90x = 30,329.52 × 20,215.90
  4. Step 4: Simplify right side
    20,215.90x = 613,138,543.37
  5. Step 5: Solve for x
    x = 613,138,543.37/20,215.90
  6. Step 6: Final answer
    x = 30,329.52

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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.