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Finding the Fourth Proportional to 8,695.28, 13,021.32 and 7,957.91

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Solution

The fourth proportional to 8,695.28, 13,021.32 and 7,957.91 is: 11,917.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,695.28 : 13,021.32 = 7,957.91 : x
  2. Step 2: Convert to fraction form
    8,695.28/13,021.32 = 7,957.91/x
  3. Step 3: Cross multiply
    8,695.28x = 13,021.32 × 7,957.91
  4. Step 4: Simplify right side
    8,695.28x = 103,622,492.64
  5. Step 5: Solve for x
    x = 103,622,492.64/8,695.28
  6. Step 6: Final answer
    x = 11,917.10

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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.