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Finding the Fourth Proportional to 7,911.02, 11,867.96 and 2,645.53

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Solution

The fourth proportional to 7,911.02, 11,867.96 and 2,645.53 is: 3,968.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,911.02 : 11,867.96 = 2,645.53 : x
  2. Step 2: Convert to fraction form
    7,911.02/11,867.96 = 2,645.53/x
  3. Step 3: Cross multiply
    7,911.02x = 11,867.96 × 2,645.53
  4. Step 4: Simplify right side
    7,911.02x = 31,397,044.22
  5. Step 5: Solve for x
    x = 31,397,044.22/7,911.02
  6. Step 6: Final answer
    x = 3,968.77

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1.5x scale

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.