Home / 5,428.56-8,137.74-1,728.78

Finding the Fourth Proportional to 5,428.56, 8,137.74 and 1,728.78

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Solution

The fourth proportional to 5,428.56, 8,137.74 and 1,728.78 is: 2,591.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.56 : 8,137.74 = 1,728.78 : x
  2. Step 2: Convert to fraction form
    5,428.56/8,137.74 = 1,728.78/x
  3. Step 3: Cross multiply
    5,428.56x = 8,137.74 × 1,728.78
  4. Step 4: Simplify right side
    5,428.56x = 14,068,362.16
  5. Step 5: Solve for x
    x = 14,068,362.16/5,428.56
  6. Step 6: Final answer
    x = 2,591.55

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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.