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Finding the Fourth Proportional to 8,679.99, 11,978.36 and 4,701.10

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Solution

The fourth proportional to 8,679.99, 11,978.36 and 4,701.10 is: 6,487.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.99 : 11,978.36 = 4,701.10 : x
  2. Step 2: Convert to fraction form
    8,679.99/11,978.36 = 4,701.10/x
  3. Step 3: Cross multiply
    8,679.99x = 11,978.36 × 4,701.10
  4. Step 4: Simplify right side
    8,679.99x = 56,311,468.20
  5. Step 5: Solve for x
    x = 56,311,468.20/8,679.99
  6. Step 6: Final answer
    x = 6,487.50

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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.