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Finding the Fourth Proportional to 15,757.92, 21,770.60 and 13,392.64

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Solution

The fourth proportional to 15,757.92, 21,770.60 and 13,392.64 is: 18,502.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,757.92 : 21,770.60 = 13,392.64 : x
  2. Step 2: Convert to fraction form
    15,757.92/21,770.60 = 13,392.64/x
  3. Step 3: Cross multiply
    15,757.92x = 21,770.60 × 13,392.64
  4. Step 4: Simplify right side
    15,757.92x = 291,565,806.30
  5. Step 5: Solve for x
    x = 291,565,806.30/15,757.92
  6. Step 6: Final answer
    x = 18,502.81

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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.