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Finding the Fourth Proportional to 58,378.57, 87,580.15 and 18,932.61

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Solution

The fourth proportional to 58,378.57, 87,580.15 and 18,932.61 is: 28,402.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,378.57 : 87,580.15 = 18,932.61 : x
  2. Step 2: Convert to fraction form
    58,378.57/87,580.15 = 18,932.61/x
  3. Step 3: Cross multiply
    58,378.57x = 87,580.15 × 18,932.61
  4. Step 4: Simplify right side
    58,378.57x = 1,658,120,385.79
  5. Step 5: Solve for x
    x = 1,658,120,385.79/58,378.57
  6. Step 6: Final answer
    x = 28,402.90

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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.