Home / 20,515,865.90-28,309,121.60-11,696,454.87

Finding the Fourth Proportional to 20,515,865.90, 28,309,121.60 and 11,696,454.87

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Solution

The fourth proportional to 20,515,865.90, 28,309,121.60 and 11,696,454.87 is: 16,139,526.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515,865.90 : 28,309,121.60 = 11,696,454.87 : x
  2. Step 2: Convert to fraction form
    20,515,865.90/28,309,121.60 = 11,696,454.87/x
  3. Step 3: Cross multiply
    20,515,865.90x = 28,309,121.60 × 11,696,454.87
  4. Step 4: Simplify right side
    20,515,865.90x = 331,116,363,145,259.88
  5. Step 5: Solve for x
    x = 331,116,363,145,259.88/20,515,865.90
  6. Step 6: Final answer
    x = 16,139,526.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.