Home / 21,020,380.20-31,530,570.30-18,748,469.93

Finding the Fourth Proportional to 21,020,380.20, 31,530,570.30 and 18,748,469.93

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Solution

The fourth proportional to 21,020,380.20, 31,530,570.30 and 18,748,469.93 is: 28,122,704.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,020,380.20 : 31,530,570.30 = 18,748,469.93 : x
  2. Step 2: Convert to fraction form
    21,020,380.20/31,530,570.30 = 18,748,469.93/x
  3. Step 3: Cross multiply
    21,020,380.20x = 31,530,570.30 × 18,748,469.93
  4. Step 4: Simplify right side
    21,020,380.20x = 591,149,948,987,648.25
  5. Step 5: Solve for x
    x = 591,149,948,987,648.25/21,020,380.20
  6. Step 6: Final answer
    x = 28,122,704.89

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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.