Home / 21,126,630.80-31,689,946.20-20,977,331.60

Finding the Fourth Proportional to 21,126,630.80, 31,689,946.20 and 20,977,331.60

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Solution

The fourth proportional to 21,126,630.80, 31,689,946.20 and 20,977,331.60 is: 31,465,997.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,126,630.80 : 31,689,946.20 = 20,977,331.60 : x
  2. Step 2: Convert to fraction form
    21,126,630.80/31,689,946.20 = 20,977,331.60/x
  3. Step 3: Cross multiply
    21,126,630.80x = 31,689,946.20 × 20,977,331.60
  4. Step 4: Simplify right side
    21,126,630.80x = 664,770,509,823,560
  5. Step 5: Solve for x
    x = 664,770,509,823,560/21,126,630.80
  6. Step 6: Final answer
    x = 31,465,997.40

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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.