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Finding the Fourth Proportional to 58,442.39, 87,644.96 and 18,989.99

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Solution

The fourth proportional to 58,442.39, 87,644.96 and 18,989.99 is: 28,478.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,442.39 : 87,644.96 = 18,989.99 : x
  2. Step 2: Convert to fraction form
    58,442.39/87,644.96 = 18,989.99/x
  3. Step 3: Cross multiply
    58,442.39x = 87,644.96 × 18,989.99
  4. Step 4: Simplify right side
    58,442.39x = 1,664,376,819.00
  5. Step 5: Solve for x
    x = 1,664,376,819.00/58,442.39
  6. Step 6: Final answer
    x = 28,478.93

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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.