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Finding the Fourth Proportional to 14,702, 20,288.60 and 7,987.64

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Solution

The fourth proportional to 14,702, 20,288.60 and 7,987.64 is: 11,022.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,702 : 20,288.60 = 7,987.64 : x
  2. Step 2: Convert to fraction form
    14,702/20,288.60 = 7,987.64/x
  3. Step 3: Cross multiply
    14,702x = 20,288.60 × 7,987.64
  4. Step 4: Simplify right side
    14,702x = 162,058,032.90
  5. Step 5: Solve for x
    x = 162,058,032.90/14,702
  6. Step 6: Final answer
    x = 11,022.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.