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Finding the Fourth Proportional to 18,678.54, 28,014.93 and 8,288.46

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Solution

The fourth proportional to 18,678.54, 28,014.93 and 8,288.46 is: 12,431.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,678.54 : 28,014.93 = 8,288.46 : x
  2. Step 2: Convert to fraction form
    18,678.54/28,014.93 = 8,288.46/x
  3. Step 3: Cross multiply
    18,678.54x = 28,014.93 × 8,288.46
  4. Step 4: Simplify right side
    18,678.54x = 232,200,626.71
  5. Step 5: Solve for x
    x = 232,200,626.71/18,678.54
  6. Step 6: Final answer
    x = 12,431.41

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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.