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Finding the Fourth Proportional to 18,678, 28,017.12 and 5,528.76

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Solution

The fourth proportional to 18,678, 28,017.12 and 5,528.76 is: 8,293.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,678 : 28,017.12 = 5,528.76 : x
  2. Step 2: Convert to fraction form
    18,678/28,017.12 = 5,528.76/x
  3. Step 3: Cross multiply
    18,678x = 28,017.12 × 5,528.76
  4. Step 4: Simplify right side
    18,678x = 154,899,932.37
  5. Step 5: Solve for x
    x = 154,899,932.37/18,678
  6. Step 6: Final answer
    x = 8,293.18

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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.