Home / 21,123,991.20-31,685,986.80-5,167,639.20

Finding the Fourth Proportional to 21,123,991.20, 31,685,986.80 and 5,167,639.20

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Solution

The fourth proportional to 21,123,991.20, 31,685,986.80 and 5,167,639.20 is: 7,751,458.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,123,991.20 : 31,685,986.80 = 5,167,639.20 : x
  2. Step 2: Convert to fraction form
    21,123,991.20/31,685,986.80 = 5,167,639.20/x
  3. Step 3: Cross multiply
    21,123,991.20x = 31,685,986.80 × 5,167,639.20
  4. Step 4: Simplify right side
    21,123,991.20x = 163,741,747,478,362.56
  5. Step 5: Solve for x
    x = 163,741,747,478,362.56/21,123,991.20
  6. Step 6: Final answer
    x = 7,751,458.80

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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.