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Finding the Fourth Proportional to 20,235.97, 27,929.03 and 12,283.49

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Solution

The fourth proportional to 20,235.97, 27,929.03 and 12,283.49 is: 16,953.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,235.97 : 27,929.03 = 12,283.49 : x
  2. Step 2: Convert to fraction form
    20,235.97/27,929.03 = 12,283.49/x
  3. Step 3: Cross multiply
    20,235.97x = 27,929.03 × 12,283.49
  4. Step 4: Simplify right side
    20,235.97x = 343,065,969.12
  5. Step 5: Solve for x
    x = 343,065,969.12/20,235.97
  6. Step 6: Final answer
    x = 16,953.28

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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.