Home / 5,157.68-7,728.01-2,688.80

Finding the Fourth Proportional to 5,157.68, 7,728.01 and 2,688.80

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Solution

The fourth proportional to 5,157.68, 7,728.01 and 2,688.80 is: 4,028.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,157.68 : 7,728.01 = 2,688.80 : x
  2. Step 2: Convert to fraction form
    5,157.68/7,728.01 = 2,688.80/x
  3. Step 3: Cross multiply
    5,157.68x = 7,728.01 × 2,688.80
  4. Step 4: Simplify right side
    5,157.68x = 20,779,027.93
  5. Step 5: Solve for x
    x = 20,779,027.93/5,157.68
  6. Step 6: Final answer
    x = 4,028.76

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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.