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Finding the Fourth Proportional to 20,215.80, 29,283.75 and 20,215.80

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Solution

The fourth proportional to 20,215.80, 29,283.75 and 20,215.80 is: 29,283.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,215.80 : 29,283.75 = 20,215.80 : x
  2. Step 2: Convert to fraction form
    20,215.80/29,283.75 = 20,215.80/x
  3. Step 3: Cross multiply
    20,215.80x = 29,283.75 × 20,215.80
  4. Step 4: Simplify right side
    20,215.80x = 591,994,433.25
  5. Step 5: Solve for x
    x = 591,994,433.25/20,215.80
  6. Step 6: Final answer
    x = 29,283.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.