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Finding the Fourth Proportional to 18,841, 28,262.04 and 4,990

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Solution

The fourth proportional to 18,841, 28,262.04 and 4,990 is: 7,485.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,841 : 28,262.04 = 4,990 : x
  2. Step 2: Convert to fraction form
    18,841/28,262.04 = 4,990/x
  3. Step 3: Cross multiply
    18,841x = 28,262.04 × 4,990
  4. Step 4: Simplify right side
    18,841x = 141,027,579.60
  5. Step 5: Solve for x
    x = 141,027,579.60/18,841
  6. Step 6: Final answer
    x = 7,485.14

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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.