Home / 6,919.47-10,378.08-1,987.99

Finding the Fourth Proportional to 6,919.47, 10,378.08 and 1,987.99

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Solution

The fourth proportional to 6,919.47, 10,378.08 and 1,987.99 is: 2,981.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,919.47 : 10,378.08 = 1,987.99 : x
  2. Step 2: Convert to fraction form
    6,919.47/10,378.08 = 1,987.99/x
  3. Step 3: Cross multiply
    6,919.47x = 10,378.08 × 1,987.99
  4. Step 4: Simplify right side
    6,919.47x = 20,631,467.37
  5. Step 5: Solve for x
    x = 20,631,467.37/6,919.47
  6. Step 6: Final answer
    x = 2,981.66

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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.