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Finding the Fourth Proportional to 31,807.98, 47,705.49 and 12,079.62

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Solution

The fourth proportional to 31,807.98, 47,705.49 and 12,079.62 is: 18,116.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,807.98 : 47,705.49 = 12,079.62 : x
  2. Step 2: Convert to fraction form
    31,807.98/47,705.49 = 12,079.62/x
  3. Step 3: Cross multiply
    31,807.98x = 47,705.49 × 12,079.62
  4. Step 4: Simplify right side
    31,807.98x = 576,264,191.11
  5. Step 5: Solve for x
    x = 576,264,191.11/31,807.98
  6. Step 6: Final answer
    x = 18,116.97

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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.