Home / 10,921.75-16,378.46-3,900.45

Finding the Fourth Proportional to 10,921.75, 16,378.46 and 3,900.45

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Solution

The fourth proportional to 10,921.75, 16,378.46 and 3,900.45 is: 5,849.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,921.75 : 16,378.46 = 3,900.45 : x
  2. Step 2: Convert to fraction form
    10,921.75/16,378.46 = 3,900.45/x
  3. Step 3: Cross multiply
    10,921.75x = 16,378.46 × 3,900.45
  4. Step 4: Simplify right side
    10,921.75x = 63,883,364.31
  5. Step 5: Solve for x
    x = 63,883,364.31/10,921.75
  6. Step 6: Final answer
    x = 5,849.19

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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.