Home / 20,698.10-31,029.60-7,542.80

Finding the Fourth Proportional to 20,698.10, 31,029.60 and 7,542.80

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Solution

The fourth proportional to 20,698.10, 31,029.60 and 7,542.80 is: 11,307.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,698.10 : 31,029.60 = 7,542.80 : x
  2. Step 2: Convert to fraction form
    20,698.10/31,029.60 = 7,542.80/x
  3. Step 3: Cross multiply
    20,698.10x = 31,029.60 × 7,542.80
  4. Step 4: Simplify right side
    20,698.10x = 234,050,066.88
  5. Step 5: Solve for x
    x = 234,050,066.88/20,698.10
  6. Step 6: Final answer
    x = 11,307.80

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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.