Home / 31,512.36-47,267.76-12,787.38

Finding the Fourth Proportional to 31,512.36, 47,267.76 and 12,787.38

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Solution

The fourth proportional to 31,512.36, 47,267.76 and 12,787.38 is: 19,180.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,512.36 : 47,267.76 = 12,787.38 : x
  2. Step 2: Convert to fraction form
    31,512.36/47,267.76 = 12,787.38/x
  3. Step 3: Cross multiply
    31,512.36x = 47,267.76 × 12,787.38
  4. Step 4: Simplify right side
    31,512.36x = 604,430,808.87
  5. Step 5: Solve for x
    x = 604,430,808.87/31,512.36
  6. Step 6: Final answer
    x = 19,180.75

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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.