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Finding the Fourth Proportional to 58,433.44, 87,663.88 and 18,990.56

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Solution

The fourth proportional to 58,433.44, 87,663.88 and 18,990.56 is: 28,490.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,433.44 : 87,663.88 = 18,990.56 : x
  2. Step 2: Convert to fraction form
    58,433.44/87,663.88 = 18,990.56/x
  3. Step 3: Cross multiply
    58,433.44x = 87,663.88 × 18,990.56
  4. Step 4: Simplify right side
    58,433.44x = 1,664,786,172.97
  5. Step 5: Solve for x
    x = 1,664,786,172.97/58,433.44
  6. Step 6: Final answer
    x = 28,490.30

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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.