Home / 10,921.94-16,378.74-3,900.64

Finding the Fourth Proportional to 10,921.94, 16,378.74 and 3,900.64

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Solution

The fourth proportional to 10,921.94, 16,378.74 and 3,900.64 is: 5,849.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,921.94 : 16,378.74 = 3,900.64 : x
  2. Step 2: Convert to fraction form
    10,921.94/16,378.74 = 3,900.64/x
  3. Step 3: Cross multiply
    10,921.94x = 16,378.74 × 3,900.64
  4. Step 4: Simplify right side
    10,921.94x = 63,887,580.58
  5. Step 5: Solve for x
    x = 63,887,580.58/10,921.94
  6. Step 6: Final answer
    x = 5,849.47

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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.