Home / 31,986.42-47,982.51-8,612.34

Finding the Fourth Proportional to 31,986.42, 47,982.51 and 8,612.34

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Solution

The fourth proportional to 31,986.42, 47,982.51 and 8,612.34 is: 12,919.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,986.42 : 47,982.51 = 8,612.34 : x
  2. Step 2: Convert to fraction form
    31,986.42/47,982.51 = 8,612.34/x
  3. Step 3: Cross multiply
    31,986.42x = 47,982.51 × 8,612.34
  4. Step 4: Simplify right side
    31,986.42x = 413,241,690.17
  5. Step 5: Solve for x
    x = 413,241,690.17/31,986.42
  6. Step 6: Final answer
    x = 12,919.29

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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.