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Finding the Fourth Proportional to 58,479.57, 87,726.21 and 20,517.23

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Solution

The fourth proportional to 58,479.57, 87,726.21 and 20,517.23 is: 30,778.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,479.57 : 87,726.21 = 20,517.23 : x
  2. Step 2: Convert to fraction form
    58,479.57/87,726.21 = 20,517.23/x
  3. Step 3: Cross multiply
    58,479.57x = 87,726.21 × 20,517.23
  4. Step 4: Simplify right side
    58,479.57x = 1,799,898,827.60
  5. Step 5: Solve for x
    x = 1,799,898,827.60/58,479.57
  6. Step 6: Final answer
    x = 30,778.25

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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.