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Finding the Fourth Proportional to 13,999, 21,000.68 and 5,235.16

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Solution

The fourth proportional to 13,999, 21,000.68 and 5,235.16 is: 7,853.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,999 : 21,000.68 = 5,235.16 : x
  2. Step 2: Convert to fraction form
    13,999/21,000.68 = 5,235.16/x
  3. Step 3: Cross multiply
    13,999x = 21,000.68 × 5,235.16
  4. Step 4: Simplify right side
    13,999x = 109,941,919.91
  5. Step 5: Solve for x
    x = 109,941,919.91/13,999
  6. Step 6: Final answer
    x = 7,853.56

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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.