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Finding the Fourth Proportional to 18,855.16, 28,275.44 and 6,371.84

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Solution

The fourth proportional to 18,855.16, 28,275.44 and 6,371.84 is: 9,555.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,855.16 : 28,275.44 = 6,371.84 : x
  2. Step 2: Convert to fraction form
    18,855.16/28,275.44 = 6,371.84/x
  3. Step 3: Cross multiply
    18,855.16x = 28,275.44 × 6,371.84
  4. Step 4: Simplify right side
    18,855.16x = 180,166,579.61
  5. Step 5: Solve for x
    x = 180,166,579.61/18,855.16
  6. Step 6: Final answer
    x = 9,555.29

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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.