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Finding the Fourth Proportional to 8,688.03, 11,989.49 and 4,709.14

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Solution

The fourth proportional to 8,688.03, 11,989.49 and 4,709.14 is: 6,498.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.03 : 11,989.49 = 4,709.14 : x
  2. Step 2: Convert to fraction form
    8,688.03/11,989.49 = 4,709.14/x
  3. Step 3: Cross multiply
    8,688.03x = 11,989.49 × 4,709.14
  4. Step 4: Simplify right side
    8,688.03x = 56,460,133.42
  5. Step 5: Solve for x
    x = 56,460,133.42/8,688.03
  6. Step 6: Final answer
    x = 6,498.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.