Home / 7,981.30-11,971.98-2,785.96

Finding the Fourth Proportional to 7,981.30, 11,971.98 and 2,785.96

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Solution

The fourth proportional to 7,981.30, 11,971.98 and 2,785.96 is: 4,178.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,981.30 : 11,971.98 = 2,785.96 : x
  2. Step 2: Convert to fraction form
    7,981.30/11,971.98 = 2,785.96/x
  3. Step 3: Cross multiply
    7,981.30x = 11,971.98 × 2,785.96
  4. Step 4: Simplify right side
    7,981.30x = 33,353,457.40
  5. Step 5: Solve for x
    x = 33,353,457.40/7,981.30
  6. Step 6: Final answer
    x = 4,178.95

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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.