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Finding the Fourth Proportional to 9,978.36, 14,967.60 and 4,134.90

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Solution

The fourth proportional to 9,978.36, 14,967.60 and 4,134.90 is: 6,202.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,978.36 : 14,967.60 = 4,134.90 : x
  2. Step 2: Convert to fraction form
    9,978.36/14,967.60 = 4,134.90/x
  3. Step 3: Cross multiply
    9,978.36x = 14,967.60 × 4,134.90
  4. Step 4: Simplify right side
    9,978.36x = 61,889,529.24
  5. Step 5: Solve for x
    x = 61,889,529.24/9,978.36
  6. Step 6: Final answer
    x = 6,202.37

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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.