Home / 31,856.10-47,778.55-12,135.84

Finding the Fourth Proportional to 31,856.10, 47,778.55 and 12,135.84

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Solution

The fourth proportional to 31,856.10, 47,778.55 and 12,135.84 is: 18,201.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,856.10 : 47,778.55 = 12,135.84 : x
  2. Step 2: Convert to fraction form
    31,856.10/47,778.55 = 12,135.84/x
  3. Step 3: Cross multiply
    31,856.10x = 47,778.55 × 12,135.84
  4. Step 4: Simplify right side
    31,856.10x = 579,832,838.23
  5. Step 5: Solve for x
    x = 579,832,838.23/31,856.10
  6. Step 6: Final answer
    x = 18,201.63

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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.