Home / 21,143,713.20-31,715,569.80-20,612,272.20

Finding the Fourth Proportional to 21,143,713.20, 31,715,569.80 and 20,612,272.20

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Solution

The fourth proportional to 21,143,713.20, 31,715,569.80 and 20,612,272.20 is: 30,918,408.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,143,713.20 : 31,715,569.80 = 20,612,272.20 : x
  2. Step 2: Convert to fraction form
    21,143,713.20/31,715,569.80 = 20,612,272.20/x
  3. Step 3: Cross multiply
    21,143,713.20x = 31,715,569.80 × 20,612,272.20
  4. Step 4: Simplify right side
    21,143,713.20x = 653,729,957,695,699.50
  5. Step 5: Solve for x
    x = 653,729,957,695,699.50/21,143,713.20
  6. Step 6: Final answer
    x = 30,918,408.30

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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.