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Finding the Fourth Proportional to 8,765.81, 13,137.78 and 4,384.52

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Solution

The fourth proportional to 8,765.81, 13,137.78 and 4,384.52 is: 6,571.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,765.81 : 13,137.78 = 4,384.52 : x
  2. Step 2: Convert to fraction form
    8,765.81/13,137.78 = 4,384.52/x
  3. Step 3: Cross multiply
    8,765.81x = 13,137.78 × 4,384.52
  4. Step 4: Simplify right side
    8,765.81x = 57,602,859.17
  5. Step 5: Solve for x
    x = 57,602,859.17/8,765.81
  6. Step 6: Final answer
    x = 6,571.31

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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.