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Finding the Fourth Proportional to 8,704.80, 13,051.80 and 5,005.20

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Solution

The fourth proportional to 8,704.80, 13,051.80 and 5,005.20 is: 7,504.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,704.80 : 13,051.80 = 5,005.20 : x
  2. Step 2: Convert to fraction form
    8,704.80/13,051.80 = 5,005.20/x
  3. Step 3: Cross multiply
    8,704.80x = 13,051.80 × 5,005.20
  4. Step 4: Simplify right side
    8,704.80x = 65,326,869.36
  5. Step 5: Solve for x
    x = 65,326,869.36/8,704.80
  6. Step 6: Final answer
    x = 7,504.70

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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.