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Finding the Fourth Proportional to 18,865.44, 28,302.22 and 5,718.84

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Solution

The fourth proportional to 18,865.44, 28,302.22 and 5,718.84 is: 8,579.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,865.44 : 28,302.22 = 5,718.84 : x
  2. Step 2: Convert to fraction form
    18,865.44/28,302.22 = 5,718.84/x
  3. Step 3: Cross multiply
    18,865.44x = 28,302.22 × 5,718.84
  4. Step 4: Simplify right side
    18,865.44x = 161,855,867.82
  5. Step 5: Solve for x
    x = 161,855,867.82/18,865.44
  6. Step 6: Final answer
    x = 8,579.49

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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.