Home / 18,858.21-28,276.50-7,772.55

Finding the Fourth Proportional to 18,858.21, 28,276.50 and 7,772.55

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Solution

The fourth proportional to 18,858.21, 28,276.50 and 7,772.55 is: 11,654.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,858.21 : 28,276.50 = 7,772.55 : x
  2. Step 2: Convert to fraction form
    18,858.21/28,276.50 = 7,772.55/x
  3. Step 3: Cross multiply
    18,858.21x = 28,276.50 × 7,772.55
  4. Step 4: Simplify right side
    18,858.21x = 219,780,510.08
  5. Step 5: Solve for x
    x = 219,780,510.08/18,858.21
  6. Step 6: Final answer
    x = 11,654.37

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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.