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Finding the Fourth Proportional to 14,679.22, 20,258.49 and 8,392

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Solution

The fourth proportional to 14,679.22, 20,258.49 and 8,392 is: 11,581.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,679.22 : 20,258.49 = 8,392 : x
  2. Step 2: Convert to fraction form
    14,679.22/20,258.49 = 8,392/x
  3. Step 3: Cross multiply
    14,679.22x = 20,258.49 × 8,392
  4. Step 4: Simplify right side
    14,679.22x = 170,009,248.08
  5. Step 5: Solve for x
    x = 170,009,248.08/14,679.22
  6. Step 6: Final answer
    x = 11,581.63

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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.