Home / 21,061,356.30-31,592,034.45-11,991,429.90

Finding the Fourth Proportional to 21,061,356.30, 31,592,034.45 and 11,991,429.90

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Solution

The fourth proportional to 21,061,356.30, 31,592,034.45 and 11,991,429.90 is: 17,987,144.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,061,356.30 : 31,592,034.45 = 11,991,429.90 : x
  2. Step 2: Convert to fraction form
    21,061,356.30/31,592,034.45 = 11,991,429.90/x
  3. Step 3: Cross multiply
    21,061,356.30x = 31,592,034.45 × 11,991,429.90
  4. Step 4: Simplify right side
    21,061,356.30x = 378,833,666,505,560.06
  5. Step 5: Solve for x
    x = 378,833,666,505,560.06/21,061,356.30
  6. Step 6: Final answer
    x = 17,987,144.85

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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.