Home / 7,982.64-11,981.20-4,089.76

Finding the Fourth Proportional to 7,982.64, 11,981.20 and 4,089.76

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Solution

The fourth proportional to 7,982.64, 11,981.20 and 4,089.76 is: 6,138.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,982.64 : 11,981.20 = 4,089.76 : x
  2. Step 2: Convert to fraction form
    7,982.64/11,981.20 = 4,089.76/x
  3. Step 3: Cross multiply
    7,982.64x = 11,981.20 × 4,089.76
  4. Step 4: Simplify right side
    7,982.64x = 49,000,232.51
  5. Step 5: Solve for x
    x = 49,000,232.51/7,982.64
  6. Step 6: Final answer
    x = 6,138.35

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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.