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Finding the Fourth Proportional to 20,699, 31,051.42 and 6,654.32

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Solution

The fourth proportional to 20,699, 31,051.42 and 6,654.32 is: 9,982.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,699 : 31,051.42 = 6,654.32 : x
  2. Step 2: Convert to fraction form
    20,699/31,051.42 = 6,654.32/x
  3. Step 3: Cross multiply
    20,699x = 31,051.42 × 6,654.32
  4. Step 4: Simplify right side
    20,699x = 206,626,085.13
  5. Step 5: Solve for x
    x = 206,626,085.13/20,699
  6. Step 6: Final answer
    x = 9,982.42

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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.