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Finding the Fourth Proportional to 8,978.04, 13,445.10 and 7,408.44

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Solution

The fourth proportional to 8,978.04, 13,445.10 and 7,408.44 is: 11,094.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,978.04 : 13,445.10 = 7,408.44 : x
  2. Step 2: Convert to fraction form
    8,978.04/13,445.10 = 7,408.44/x
  3. Step 3: Cross multiply
    8,978.04x = 13,445.10 × 7,408.44
  4. Step 4: Simplify right side
    8,978.04x = 99,607,216.64
  5. Step 5: Solve for x
    x = 99,607,216.64/8,978.04
  6. Step 6: Final answer
    x = 11,094.54

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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.