Home / 5,157.81-7,117.19-2,889.23

Finding the Fourth Proportional to 5,157.81, 7,117.19 and 2,889.23

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Solution

The fourth proportional to 5,157.81, 7,117.19 and 2,889.23 is: 3,986.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,157.81 : 7,117.19 = 2,889.23 : x
  2. Step 2: Convert to fraction form
    5,157.81/7,117.19 = 2,889.23/x
  3. Step 3: Cross multiply
    5,157.81x = 7,117.19 × 2,889.23
  4. Step 4: Simplify right side
    5,157.81x = 20,563,202.21
  5. Step 5: Solve for x
    x = 20,563,202.21/5,157.81
  6. Step 6: Final answer
    x = 3,986.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.