Home / 5,427.20-8,138.48-1,728.16

Finding the Fourth Proportional to 5,427.20, 8,138.48 and 1,728.16

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Solution

The fourth proportional to 5,427.20, 8,138.48 and 1,728.16 is: 2,591.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,427.20 : 8,138.48 = 1,728.16 : x
  2. Step 2: Convert to fraction form
    5,427.20/8,138.48 = 1,728.16/x
  3. Step 3: Cross multiply
    5,427.20x = 8,138.48 × 1,728.16
  4. Step 4: Simplify right side
    5,427.20x = 14,064,595.60
  5. Step 5: Solve for x
    x = 14,064,595.60/5,427.20
  6. Step 6: Final answer
    x = 2,591.50

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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.