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Finding the Fourth Proportional to 18,805.66, 28,227.47 and 8,280.37

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Solution

The fourth proportional to 18,805.66, 28,227.47 and 8,280.37 is: 12,428.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,805.66 : 28,227.47 = 8,280.37 : x
  2. Step 2: Convert to fraction form
    18,805.66/28,227.47 = 8,280.37/x
  3. Step 3: Cross multiply
    18,805.66x = 28,227.47 × 8,280.37
  4. Step 4: Simplify right side
    18,805.66x = 233,733,754.63
  5. Step 5: Solve for x
    x = 233,733,754.63/18,805.66
  6. Step 6: Final answer
    x = 12,428.91

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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.