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Finding the Fourth Proportional to 8,961.63, 12,334.40 and 7,892.41

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Solution

The fourth proportional to 8,961.63, 12,334.40 and 7,892.41 is: 10,862.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,961.63 : 12,334.40 = 7,892.41 : x
  2. Step 2: Convert to fraction form
    8,961.63/12,334.40 = 7,892.41/x
  3. Step 3: Cross multiply
    8,961.63x = 12,334.40 × 7,892.41
  4. Step 4: Simplify right side
    8,961.63x = 97,348,141.90
  5. Step 5: Solve for x
    x = 97,348,141.90/8,961.63
  6. Step 6: Final answer
    x = 10,862.77

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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.