Home / 12,640.74-18,961.55-4,742.45

Finding the Fourth Proportional to 12,640.74, 18,961.55 and 4,742.45

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Solution

The fourth proportional to 12,640.74, 18,961.55 and 4,742.45 is: 7,113.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,640.74 : 18,961.55 = 4,742.45 : x
  2. Step 2: Convert to fraction form
    12,640.74/18,961.55 = 4,742.45/x
  3. Step 3: Cross multiply
    12,640.74x = 18,961.55 × 4,742.45
  4. Step 4: Simplify right side
    12,640.74x = 89,924,084.28
  5. Step 5: Solve for x
    x = 89,924,084.28/12,640.74
  6. Step 6: Final answer
    x = 7,113.83

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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.