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Finding the Fourth Proportional to 8,807.70, 13,221.15 and 4,919.70

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Solution

The fourth proportional to 8,807.70, 13,221.15 and 4,919.70 is: 7,384.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,807.70 : 13,221.15 = 4,919.70 : x
  2. Step 2: Convert to fraction form
    8,807.70/13,221.15 = 4,919.70/x
  3. Step 3: Cross multiply
    8,807.70x = 13,221.15 × 4,919.70
  4. Step 4: Simplify right side
    8,807.70x = 65,044,091.66
  5. Step 5: Solve for x
    x = 65,044,091.66/8,807.70
  6. Step 6: Final answer
    x = 7,384.91

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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.