Home / 20,921.94-31,378.86-5,928.93

Finding the Fourth Proportional to 20,921.94, 31,378.86 and 5,928.93

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Solution

The fourth proportional to 20,921.94, 31,378.86 and 5,928.93 is: 8,892.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,921.94 : 31,378.86 = 5,928.93 : x
  2. Step 2: Convert to fraction form
    20,921.94/31,378.86 = 5,928.93/x
  3. Step 3: Cross multiply
    20,921.94x = 31,378.86 × 5,928.93
  4. Step 4: Simplify right side
    20,921.94x = 186,043,157.69
  5. Step 5: Solve for x
    x = 186,043,157.69/20,921.94
  6. Step 6: Final answer
    x = 8,892.25

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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.