Home / 6,921.94-10,384.28-1,991.63

Finding the Fourth Proportional to 6,921.94, 10,384.28 and 1,991.63

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Solution

The fourth proportional to 6,921.94, 10,384.28 and 1,991.63 is: 2,987.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,921.94 : 10,384.28 = 1,991.63 : x
  2. Step 2: Convert to fraction form
    6,921.94/10,384.28 = 1,991.63/x
  3. Step 3: Cross multiply
    6,921.94x = 10,384.28 × 1,991.63
  4. Step 4: Simplify right side
    6,921.94x = 20,681,643.58
  5. Step 5: Solve for x
    x = 20,681,643.58/6,921.94
  6. Step 6: Final answer
    x = 2,987.84

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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.