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Finding the Fourth Proportional to 21,751.57, 30,019.28 and 12,193.08

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Solution

The fourth proportional to 21,751.57, 30,019.28 and 12,193.08 is: 16,827.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,751.57 : 30,019.28 = 12,193.08 : x
  2. Step 2: Convert to fraction form
    21,751.57/30,019.28 = 12,193.08/x
  3. Step 3: Cross multiply
    21,751.57x = 30,019.28 × 12,193.08
  4. Step 4: Simplify right side
    21,751.57x = 366,027,477.90
  5. Step 5: Solve for x
    x = 366,027,477.90/21,751.57
  6. Step 6: Final answer
    x = 16,827.63

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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.