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Finding the Fourth Proportional to 18,962.51, 28,447.07 and 6,483.78

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Solution

The fourth proportional to 18,962.51, 28,447.07 and 6,483.78 is: 9,726.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,962.51 : 28,447.07 = 6,483.78 : x
  2. Step 2: Convert to fraction form
    18,962.51/28,447.07 = 6,483.78/x
  3. Step 3: Cross multiply
    18,962.51x = 28,447.07 × 6,483.78
  4. Step 4: Simplify right side
    18,962.51x = 184,444,511.11
  5. Step 5: Solve for x
    x = 184,444,511.11/18,962.51
  6. Step 6: Final answer
    x = 9,726.80

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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.