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Finding the Fourth Proportional to 31,868.03, 47,758.98 and 12,135.82

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Solution

The fourth proportional to 31,868.03, 47,758.98 and 12,135.82 is: 18,187.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,868.03 : 47,758.98 = 12,135.82 : x
  2. Step 2: Convert to fraction form
    31,868.03/47,758.98 = 12,135.82/x
  3. Step 3: Cross multiply
    31,868.03x = 47,758.98 × 12,135.82
  4. Step 4: Simplify right side
    31,868.03x = 579,594,384.66
  5. Step 5: Solve for x
    x = 579,594,384.66/31,868.03
  6. Step 6: Final answer
    x = 18,187.33

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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.