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Finding the Fourth Proportional to 8,903.72, 13,351.08 and 2,978.48

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Solution

The fourth proportional to 8,903.72, 13,351.08 and 2,978.48 is: 4,466.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,903.72 : 13,351.08 = 2,978.48 : x
  2. Step 2: Convert to fraction form
    8,903.72/13,351.08 = 2,978.48/x
  3. Step 3: Cross multiply
    8,903.72x = 13,351.08 × 2,978.48
  4. Step 4: Simplify right side
    8,903.72x = 39,765,924.76
  5. Step 5: Solve for x
    x = 39,765,924.76/8,903.72
  6. Step 6: Final answer
    x = 4,466.21

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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.