Home / 21,137,319.72-31,695,992.28-8,189,536.20

Finding the Fourth Proportional to 21,137,319.72, 31,695,992.28 and 8,189,536.20

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Solution

The fourth proportional to 21,137,319.72, 31,695,992.28 and 8,189,536.20 is: 12,280,434.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,137,319.72 : 31,695,992.28 = 8,189,536.20 : x
  2. Step 2: Convert to fraction form
    21,137,319.72/31,695,992.28 = 8,189,536.20/x
  3. Step 3: Cross multiply
    21,137,319.72x = 31,695,992.28 × 8,189,536.20
  4. Step 4: Simplify right side
    21,137,319.72x = 259,575,476,171,980.56
  5. Step 5: Solve for x
    x = 259,575,476,171,980.56/21,137,319.72
  6. Step 6: Final answer
    x = 12,280,434.78

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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.