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Finding the Fourth Proportional to 18,676.50, 28,019.16 and 5,528.40

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Solution

The fourth proportional to 18,676.50, 28,019.16 and 5,528.40 is: 8,293.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,676.50 : 28,019.16 = 5,528.40 : x
  2. Step 2: Convert to fraction form
    18,676.50/28,019.16 = 5,528.40/x
  3. Step 3: Cross multiply
    18,676.50x = 28,019.16 × 5,528.40
  4. Step 4: Simplify right side
    18,676.50x = 154,901,124.14
  5. Step 5: Solve for x
    x = 154,901,124.14/18,676.50
  6. Step 6: Final answer
    x = 8,293.91

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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.