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Finding the Fourth Proportional to 35,978.40, 53,924.40 and 18,439.20

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Solution

The fourth proportional to 35,978.40, 53,924.40 and 18,439.20 is: 27,636.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,978.40 : 53,924.40 = 18,439.20 : x
  2. Step 2: Convert to fraction form
    35,978.40/53,924.40 = 18,439.20/x
  3. Step 3: Cross multiply
    35,978.40x = 53,924.40 × 18,439.20
  4. Step 4: Simplify right side
    35,978.40x = 994,322,796.48
  5. Step 5: Solve for x
    x = 994,322,796.48/35,978.40
  6. Step 6: Final answer
    x = 27,636.66

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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.