Home / 20,746.82-31,043.66-12,432.70

Finding the Fourth Proportional to 20,746.82, 31,043.66 and 12,432.70

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Solution

The fourth proportional to 20,746.82, 31,043.66 and 12,432.70 is: 18,603.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,746.82 : 31,043.66 = 12,432.70 : x
  2. Step 2: Convert to fraction form
    20,746.82/31,043.66 = 12,432.70/x
  3. Step 3: Cross multiply
    20,746.82x = 31,043.66 × 12,432.70
  4. Step 4: Simplify right side
    20,746.82x = 385,956,511.68
  5. Step 5: Solve for x
    x = 385,956,511.68/20,746.82
  6. Step 6: Final answer
    x = 18,603.16

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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.