Home / 6,917.80-10,378.08-1,987.48

Finding the Fourth Proportional to 6,917.80, 10,378.08 and 1,987.48

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Solution

The fourth proportional to 6,917.80, 10,378.08 and 1,987.48 is: 2,981.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,917.80 : 10,378.08 = 1,987.48 : x
  2. Step 2: Convert to fraction form
    6,917.80/10,378.08 = 1,987.48/x
  3. Step 3: Cross multiply
    6,917.80x = 10,378.08 × 1,987.48
  4. Step 4: Simplify right side
    6,917.80x = 20,626,226.44
  5. Step 5: Solve for x
    x = 20,626,226.44/6,917.80
  6. Step 6: Final answer
    x = 2,981.62

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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.