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Finding the Fourth Proportional to 14,290.50, 19,720.90 and 8,003.02

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Solution

The fourth proportional to 14,290.50, 19,720.90 and 8,003.02 is: 11,044.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,290.50 : 19,720.90 = 8,003.02 : x
  2. Step 2: Convert to fraction form
    14,290.50/19,720.90 = 8,003.02/x
  3. Step 3: Cross multiply
    14,290.50x = 19,720.90 × 8,003.02
  4. Step 4: Simplify right side
    14,290.50x = 157,826,757.12
  5. Step 5: Solve for x
    x = 157,826,757.12/14,290.50
  6. Step 6: Final answer
    x = 11,044.17

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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.