Home / 18,865.21-28,301.91-5,718.60

Finding the Fourth Proportional to 18,865.21, 28,301.91 and 5,718.60

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Solution

The fourth proportional to 18,865.21, 28,301.91 and 5,718.60 is: 8,579.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,865.21 : 28,301.91 = 5,718.60 : x
  2. Step 2: Convert to fraction form
    18,865.21/28,301.91 = 5,718.60/x
  3. Step 3: Cross multiply
    18,865.21x = 28,301.91 × 5,718.60
  4. Step 4: Simplify right side
    18,865.21x = 161,847,302.53
  5. Step 5: Solve for x
    x = 161,847,302.53/18,865.21
  6. Step 6: Final answer
    x = 8,579.14

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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.