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Finding the Fourth Proportional to 32,690.31, 48,988.70 and 18,621.30

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Solution

The fourth proportional to 32,690.31, 48,988.70 and 18,621.30 is: 27,905.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    32,690.31 : 48,988.70 = 18,621.30 : x
  2. Step 2: Convert to fraction form
    32,690.31/48,988.70 = 18,621.30/x
  3. Step 3: Cross multiply
    32,690.31x = 48,988.70 × 18,621.30
  4. Step 4: Simplify right side
    32,690.31x = 912,233,186.20
  5. Step 5: Solve for x
    x = 912,233,186.20/32,690.31
  6. Step 6: Final answer
    x = 27,905.31

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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.