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Finding the Fourth Proportional to 15,168.60, 20,931.93 and 8,454.96

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Solution

The fourth proportional to 15,168.60, 20,931.93 and 8,454.96 is: 11,667.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,168.60 : 20,931.93 = 8,454.96 : x
  2. Step 2: Convert to fraction form
    15,168.60/20,931.93 = 8,454.96/x
  3. Step 3: Cross multiply
    15,168.60x = 20,931.93 × 8,454.96
  4. Step 4: Simplify right side
    15,168.60x = 176,978,630.87
  5. Step 5: Solve for x
    x = 176,978,630.87/15,168.60
  6. Step 6: Final answer
    x = 11,667.43

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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.