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Finding the Fourth Proportional to 18,822.74, 28,235.06 and 4,782.90

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Solution

The fourth proportional to 18,822.74, 28,235.06 and 4,782.90 is: 7,174.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,822.74 : 28,235.06 = 4,782.90 : x
  2. Step 2: Convert to fraction form
    18,822.74/28,235.06 = 4,782.90/x
  3. Step 3: Cross multiply
    18,822.74x = 28,235.06 × 4,782.90
  4. Step 4: Simplify right side
    18,822.74x = 135,045,605.04
  5. Step 5: Solve for x
    x = 135,045,605.04/18,822.74
  6. Step 6: Final answer
    x = 7,174.60

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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.