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Finding the Fourth Proportional to 8,680.30, 12,999.48 and 4,971.28

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Solution

The fourth proportional to 8,680.30, 12,999.48 and 4,971.28 is: 7,444.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,680.30 : 12,999.48 = 4,971.28 : x
  2. Step 2: Convert to fraction form
    8,680.30/12,999.48 = 4,971.28/x
  3. Step 3: Cross multiply
    8,680.30x = 12,999.48 × 4,971.28
  4. Step 4: Simplify right side
    8,680.30x = 64,624,054.93
  5. Step 5: Solve for x
    x = 64,624,054.93/8,680.30
  6. Step 6: Final answer
    x = 7,444.91

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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.