Home / 21,287,999.20-31,895,257.20-9,905,101.60

Finding the Fourth Proportional to 21,287,999.20, 31,895,257.20 and 9,905,101.60

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Solution

The fourth proportional to 21,287,999.20, 31,895,257.20 and 9,905,101.60 is: 14,840,556.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,287,999.20 : 31,895,257.20 = 9,905,101.60 : x
  2. Step 2: Convert to fraction form
    21,287,999.20/31,895,257.20 = 9,905,101.60/x
  3. Step 3: Cross multiply
    21,287,999.20x = 31,895,257.20 × 9,905,101.60
  4. Step 4: Simplify right side
    21,287,999.20x = 315,925,763,124,131.50
  5. Step 5: Solve for x
    x = 315,925,763,124,131.50/21,287,999.20
  6. Step 6: Final answer
    x = 14,840,556.89

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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.