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Finding the Fourth Proportional to 21,563.48, 29,757.48 and 12,132.12

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Solution

The fourth proportional to 21,563.48, 29,757.48 and 12,132.12 is: 16,742.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,563.48 : 29,757.48 = 12,132.12 : x
  2. Step 2: Convert to fraction form
    21,563.48/29,757.48 = 12,132.12/x
  3. Step 3: Cross multiply
    21,563.48x = 29,757.48 × 12,132.12
  4. Step 4: Simplify right side
    21,563.48x = 361,021,318.26
  5. Step 5: Solve for x
    x = 361,021,318.26/21,563.48
  6. Step 6: Final answer
    x = 16,742.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.