Home / 43,981.40-65,972.10-12,819.80

Finding the Fourth Proportional to 43,981.40, 65,972.10 and 12,819.80

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Solution

The fourth proportional to 43,981.40, 65,972.10 and 12,819.80 is: 19,229.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,981.40 : 65,972.10 = 12,819.80 : x
  2. Step 2: Convert to fraction form
    43,981.40/65,972.10 = 12,819.80/x
  3. Step 3: Cross multiply
    43,981.40x = 65,972.10 × 12,819.80
  4. Step 4: Simplify right side
    43,981.40x = 845,749,127.58
  5. Step 5: Solve for x
    x = 845,749,127.58/43,981.40
  6. Step 6: Final answer
    x = 19,229.70

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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.