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Finding the Fourth Proportional to 6,917.18, 10,375.50 and 1,986.80

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Solution

The fourth proportional to 6,917.18, 10,375.50 and 1,986.80 is: 2,980.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,917.18 : 10,375.50 = 1,986.80 : x
  2. Step 2: Convert to fraction form
    6,917.18/10,375.50 = 1,986.80/x
  3. Step 3: Cross multiply
    6,917.18x = 10,375.50 × 1,986.80
  4. Step 4: Simplify right side
    6,917.18x = 20,614,043.40
  5. Step 5: Solve for x
    x = 20,614,043.40/6,917.18
  6. Step 6: Final answer
    x = 2,980.12

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1.5x scale

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.