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Finding the Fourth Proportional to 7,981.02, 11,978.92 and 4,035.06

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Solution

The fourth proportional to 7,981.02, 11,978.92 and 4,035.06 is: 6,056.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,981.02 : 11,978.92 = 4,035.06 : x
  2. Step 2: Convert to fraction form
    7,981.02/11,978.92 = 4,035.06/x
  3. Step 3: Cross multiply
    7,981.02x = 11,978.92 × 4,035.06
  4. Step 4: Simplify right side
    7,981.02x = 48,335,688.32
  5. Step 5: Solve for x
    x = 48,335,688.32/7,981.02
  6. Step 6: Final answer
    x = 6,056.33

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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.