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Finding the Fourth Proportional to 8,695.50, 11,999.79 and 4,969.50

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Solution

The fourth proportional to 8,695.50, 11,999.79 and 4,969.50 is: 6,857.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,695.50 : 11,999.79 = 4,969.50 : x
  2. Step 2: Convert to fraction form
    8,695.50/11,999.79 = 4,969.50/x
  3. Step 3: Cross multiply
    8,695.50x = 11,999.79 × 4,969.50
  4. Step 4: Simplify right side
    8,695.50x = 59,632,956.41
  5. Step 5: Solve for x
    x = 59,632,956.41/8,695.50
  6. Step 6: Final answer
    x = 6,857.91

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1.5x scale

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.