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Finding the Fourth Proportional to 22,397.30, 30,906.40 and 13,197.40

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Solution

The fourth proportional to 22,397.30, 30,906.40 and 13,197.40 is: 18,211.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,397.30 : 30,906.40 = 13,197.40 : x
  2. Step 2: Convert to fraction form
    22,397.30/30,906.40 = 13,197.40/x
  3. Step 3: Cross multiply
    22,397.30x = 30,906.40 × 13,197.40
  4. Step 4: Simplify right side
    22,397.30x = 407,884,123.36
  5. Step 5: Solve for x
    x = 407,884,123.36/22,397.30
  6. Step 6: Final answer
    x = 18,211.31

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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.