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Finding the Fourth Proportional to 32,690.70, 48,989.26 and 18,621.68

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Solution

The fourth proportional to 32,690.70, 48,989.26 and 18,621.68 is: 27,905.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    32,690.70 : 48,989.26 = 18,621.68 : x
  2. Step 2: Convert to fraction form
    32,690.70/48,989.26 = 18,621.68/x
  3. Step 3: Cross multiply
    32,690.70x = 48,989.26 × 18,621.68
  4. Step 4: Simplify right side
    32,690.70x = 912,262,031.66
  5. Step 5: Solve for x
    x = 912,262,031.66/32,690.70
  6. Step 6: Final answer
    x = 27,905.86

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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.