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Finding the Fourth Proportional to 13,602.66, 18,766.85 and 8,889.67

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Solution

The fourth proportional to 13,602.66, 18,766.85 and 8,889.67 is: 12,264.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,602.66 : 18,766.85 = 8,889.67 : x
  2. Step 2: Convert to fraction form
    13,602.66/18,766.85 = 8,889.67/x
  3. Step 3: Cross multiply
    13,602.66x = 18,766.85 × 8,889.67
  4. Step 4: Simplify right side
    13,602.66x = 166,831,103.44
  5. Step 5: Solve for x
    x = 166,831,103.44/13,602.66
  6. Step 6: Final answer
    x = 12,264.59

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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.