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Finding the Fourth Proportional to 13,953.34, 20,930.06 and 3,423.43

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Solution

The fourth proportional to 13,953.34, 20,930.06 and 3,423.43 is: 5,135.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,953.34 : 20,930.06 = 3,423.43 : x
  2. Step 2: Convert to fraction form
    13,953.34/20,930.06 = 3,423.43/x
  3. Step 3: Cross multiply
    13,953.34x = 20,930.06 × 3,423.43
  4. Step 4: Simplify right side
    13,953.34x = 71,652,595.31
  5. Step 5: Solve for x
    x = 71,652,595.31/13,953.34
  6. Step 6: Final answer
    x = 5,135.16

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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.