Home / 31,981.64-47,972.70-12,255.48

Finding the Fourth Proportional to 31,981.64, 47,972.70 and 12,255.48

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Solution

The fourth proportional to 31,981.64, 47,972.70 and 12,255.48 is: 18,383.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,981.64 : 47,972.70 = 12,255.48 : x
  2. Step 2: Convert to fraction form
    31,981.64/47,972.70 = 12,255.48/x
  3. Step 3: Cross multiply
    31,981.64x = 47,972.70 × 12,255.48
  4. Step 4: Simplify right side
    31,981.64x = 587,928,465.40
  5. Step 5: Solve for x
    x = 587,928,465.40/31,981.64
  6. Step 6: Final answer
    x = 18,383.31

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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.