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Finding the Fourth Proportional to 12,652.48, 18,978.50 and 3,887.20

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Solution

The fourth proportional to 12,652.48, 18,978.50 and 3,887.20 is: 5,830.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,652.48 : 18,978.50 = 3,887.20 : x
  2. Step 2: Convert to fraction form
    12,652.48/18,978.50 = 3,887.20/x
  3. Step 3: Cross multiply
    12,652.48x = 18,978.50 × 3,887.20
  4. Step 4: Simplify right side
    12,652.48x = 73,773,225.20
  5. Step 5: Solve for x
    x = 73,773,225.20/12,652.48
  6. Step 6: Final answer
    x = 5,830.73

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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.