Home / 20,894.76-31,355.10-18,743.40

Finding the Fourth Proportional to 20,894.76, 31,355.10 and 18,743.40

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Solution

The fourth proportional to 20,894.76, 31,355.10 and 18,743.40 is: 28,126.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,894.76 : 31,355.10 = 18,743.40 : x
  2. Step 2: Convert to fraction form
    20,894.76/31,355.10 = 18,743.40/x
  3. Step 3: Cross multiply
    20,894.76x = 31,355.10 × 18,743.40
  4. Step 4: Simplify right side
    20,894.76x = 587,701,181.34
  5. Step 5: Solve for x
    x = 587,701,181.34/20,894.76
  6. Step 6: Final answer
    x = 28,126.73

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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.