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Finding the Fourth Proportional to 20,892.66, 28,832.27 and 12,822.27

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Solution

The fourth proportional to 20,892.66, 28,832.27 and 12,822.27 is: 17,694.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,892.66 : 28,832.27 = 12,822.27 : x
  2. Step 2: Convert to fraction form
    20,892.66/28,832.27 = 12,822.27/x
  3. Step 3: Cross multiply
    20,892.66x = 28,832.27 × 12,822.27
  4. Step 4: Simplify right side
    20,892.66x = 369,695,210.69
  5. Step 5: Solve for x
    x = 369,695,210.69/20,892.66
  6. Step 6: Final answer
    x = 17,694.98

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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.