Home / 20,781,005.20-31,172,220.60-6,403,958.80

Finding the Fourth Proportional to 20,781,005.20, 31,172,220.60 and 6,403,958.80

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Solution

The fourth proportional to 20,781,005.20, 31,172,220.60 and 6,403,958.80 is: 9,606,157.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781,005.20 : 31,172,220.60 = 6,403,958.80 : x
  2. Step 2: Convert to fraction form
    20,781,005.20/31,172,220.60 = 6,403,958.80/x
  3. Step 3: Cross multiply
    20,781,005.20x = 31,172,220.60 × 6,403,958.80
  4. Step 4: Simplify right side
    20,781,005.20x = 199,625,616,426,911.28
  5. Step 5: Solve for x
    x = 199,625,616,426,911.28/20,781,005.20
  6. Step 6: Final answer
    x = 9,606,157.86

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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.