Home / 21,129.62-31,699.42-6,898.02

Finding the Fourth Proportional to 21,129.62, 31,699.42 and 6,898.02

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Solution

The fourth proportional to 21,129.62, 31,699.42 and 6,898.02 is: 10,348.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,129.62 : 31,699.42 = 6,898.02 : x
  2. Step 2: Convert to fraction form
    21,129.62/31,699.42 = 6,898.02/x
  3. Step 3: Cross multiply
    21,129.62x = 31,699.42 × 6,898.02
  4. Step 4: Simplify right side
    21,129.62x = 218,663,097.03
  5. Step 5: Solve for x
    x = 218,663,097.03/21,129.62
  6. Step 6: Final answer
    x = 10,348.66

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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.