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Finding the Fourth Proportional to 8,392.35, 12,638.48 and 7,309.79

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Solution

The fourth proportional to 8,392.35, 12,638.48 and 7,309.79 is: 11,008.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,392.35 : 12,638.48 = 7,309.79 : x
  2. Step 2: Convert to fraction form
    8,392.35/12,638.48 = 7,309.79/x
  3. Step 3: Cross multiply
    8,392.35x = 12,638.48 × 7,309.79
  4. Step 4: Simplify right side
    8,392.35x = 92,384,634.72
  5. Step 5: Solve for x
    x = 92,384,634.72/8,392.35
  6. Step 6: Final answer
    x = 11,008.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.