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Finding the Fourth Proportional to 58,442.89, 87,645.70 and 18,990.49

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Solution

The fourth proportional to 58,442.89, 87,645.70 and 18,990.49 is: 28,479.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,442.89 : 87,645.70 = 18,990.49 : x
  2. Step 2: Convert to fraction form
    58,442.89/87,645.70 = 18,990.49/x
  3. Step 3: Cross multiply
    58,442.89x = 87,645.70 × 18,990.49
  4. Step 4: Simplify right side
    58,442.89x = 1,664,434,789.39
  5. Step 5: Solve for x
    x = 1,664,434,789.39/58,442.89
  6. Step 6: Final answer
    x = 28,479.68

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1.5x scale

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.