Home / 21,120,489.81-31,694,062.26-8,989,933.80

Finding the Fourth Proportional to 21,120,489.81, 31,694,062.26 and 8,989,933.80

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Solution

The fourth proportional to 21,120,489.81, 31,694,062.26 and 8,989,933.80 is: 13,490,573.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,120,489.81 : 31,694,062.26 = 8,989,933.80 : x
  2. Step 2: Convert to fraction form
    21,120,489.81/31,694,062.26 = 8,989,933.80/x
  3. Step 3: Cross multiply
    21,120,489.81x = 31,694,062.26 × 8,989,933.80
  4. Step 4: Simplify right side
    21,120,489.81x = 284,927,521,583,027.88
  5. Step 5: Solve for x
    x = 284,927,521,583,027.88/21,120,489.81
  6. Step 6: Final answer
    x = 13,490,573.57

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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.