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Finding the Fourth Proportional to 13,953.64, 20,930.46 and 3,565.39

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Solution

The fourth proportional to 13,953.64, 20,930.46 and 3,565.39 is: 5,348.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,953.64 : 20,930.46 = 3,565.39 : x
  2. Step 2: Convert to fraction form
    13,953.64/20,930.46 = 3,565.39/x
  3. Step 3: Cross multiply
    13,953.64x = 20,930.46 × 3,565.39
  4. Step 4: Simplify right side
    13,953.64x = 74,625,252.78
  5. Step 5: Solve for x
    x = 74,625,252.78/13,953.64
  6. Step 6: Final answer
    x = 5,348.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.