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Finding the Fourth Proportional to 7,127,980.21, 9,836,004.48 and 4,030,351.68

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Solution

The fourth proportional to 7,127,980.21, 9,836,004.48 and 4,030,351.68 is: 5,561,541.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,127,980.21 : 9,836,004.48 = 4,030,351.68 : x
  2. Step 2: Convert to fraction form
    7,127,980.21/9,836,004.48 = 4,030,351.68/x
  3. Step 3: Cross multiply
    7,127,980.21x = 9,836,004.48 × 4,030,351.68
  4. Step 4: Simplify right side
    7,127,980.21x = 39,642,557,158,234.56
  5. Step 5: Solve for x
    x = 39,642,557,158,234.56/7,127,980.21
  6. Step 6: Final answer
    x = 5,561,541.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.