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Finding the Fourth Proportional to 57,987.30, 86,975.46 and 18,533.82

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Solution

The fourth proportional to 57,987.30, 86,975.46 and 18,533.82 is: 27,798.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,987.30 : 86,975.46 = 18,533.82 : x
  2. Step 2: Convert to fraction form
    57,987.30/86,975.46 = 18,533.82/x
  3. Step 3: Cross multiply
    57,987.30x = 86,975.46 × 18,533.82
  4. Step 4: Simplify right side
    57,987.30x = 1,611,987,520.06
  5. Step 5: Solve for x
    x = 1,611,987,520.06/57,987.30
  6. Step 6: Final answer
    x = 27,798.98

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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.