Home / 21,002,507.80-31,503,761.70-19,207,418.20

Finding the Fourth Proportional to 21,002,507.80, 31,503,761.70 and 19,207,418.20

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Solution

The fourth proportional to 21,002,507.80, 31,503,761.70 and 19,207,418.20 is: 28,811,127.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002,507.80 : 31,503,761.70 = 19,207,418.20 : x
  2. Step 2: Convert to fraction form
    21,002,507.80/31,503,761.70 = 19,207,418.20/x
  3. Step 3: Cross multiply
    21,002,507.80x = 31,503,761.70 × 19,207,418.20
  4. Step 4: Simplify right side
    21,002,507.80x = 605,105,925,845,042.88
  5. Step 5: Solve for x
    x = 605,105,925,845,042.88/21,002,507.80
  6. Step 6: Final answer
    x = 28,811,127.30

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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.