Home / 20,685,020.80-31,027,531.20-18,452,968.60

Finding the Fourth Proportional to 20,685,020.80, 31,027,531.20 and 18,452,968.60

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Solution

The fourth proportional to 20,685,020.80, 31,027,531.20 and 18,452,968.60 is: 27,679,452.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,685,020.80 : 31,027,531.20 = 18,452,968.60 : x
  2. Step 2: Convert to fraction form
    20,685,020.80/31,027,531.20 = 18,452,968.60/x
  3. Step 3: Cross multiply
    20,685,020.80x = 31,027,531.20 × 18,452,968.60
  4. Step 4: Simplify right side
    20,685,020.80x = 572,550,058,969,120.38
  5. Step 5: Solve for x
    x = 572,550,058,969,120.38/20,685,020.80
  6. Step 6: Final answer
    x = 27,679,452.90

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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.