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Finding the Fourth Proportional to 18,969, 28,453.37 and 4,929

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Solution

The fourth proportional to 18,969, 28,453.37 and 4,929 is: 7,393.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,969 : 28,453.37 = 4,929 : x
  2. Step 2: Convert to fraction form
    18,969/28,453.37 = 4,929/x
  3. Step 3: Cross multiply
    18,969x = 28,453.37 × 4,929
  4. Step 4: Simplify right side
    18,969x = 140,246,636.09
  5. Step 5: Solve for x
    x = 140,246,636.09/18,969
  6. Step 6: Final answer
    x = 7,393.46

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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.