Home / 21,131,291.40-29,161,289.70-11,965,720.20

Finding the Fourth Proportional to 21,131,291.40, 29,161,289.70 and 11,965,720.20

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Solution

The fourth proportional to 21,131,291.40, 29,161,289.70 and 11,965,720.20 is: 16,512,754.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,131,291.40 : 29,161,289.70 = 11,965,720.20 : x
  2. Step 2: Convert to fraction form
    21,131,291.40/29,161,289.70 = 11,965,720.20/x
  3. Step 3: Cross multiply
    21,131,291.40x = 29,161,289.70 × 11,965,720.20
  4. Step 4: Simplify right side
    21,131,291.40x = 348,935,833,221,341.94
  5. Step 5: Solve for x
    x = 348,935,833,221,341.94/21,131,291.40
  6. Step 6: Final answer
    x = 16,512,754.79

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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.