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Finding the Fourth Proportional to 22,157.28, 30,577.02 and 12,221.28

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Solution

The fourth proportional to 22,157.28, 30,577.02 and 12,221.28 is: 16,865.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,157.28 : 30,577.02 = 12,221.28 : x
  2. Step 2: Convert to fraction form
    22,157.28/30,577.02 = 12,221.28/x
  3. Step 3: Cross multiply
    22,157.28x = 30,577.02 × 12,221.28
  4. Step 4: Simplify right side
    22,157.28x = 373,690,322.99
  5. Step 5: Solve for x
    x = 373,690,322.99/22,157.28
  6. Step 6: Final answer
    x = 16,865.35

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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.