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Finding the Fourth Proportional to 8,335.78, 12,492.15 and 8,131.66

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Solution

The fourth proportional to 8,335.78, 12,492.15 and 8,131.66 is: 12,186.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,335.78 : 12,492.15 = 8,131.66 : x
  2. Step 2: Convert to fraction form
    8,335.78/12,492.15 = 8,131.66/x
  3. Step 3: Cross multiply
    8,335.78x = 12,492.15 × 8,131.66
  4. Step 4: Simplify right side
    8,335.78x = 101,581,916.47
  5. Step 5: Solve for x
    x = 101,581,916.47/8,335.78
  6. Step 6: Final answer
    x = 12,186.25

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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.