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Finding the Fourth Proportional to 18,874.45, 28,312.08 and 6,866.20

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Solution

The fourth proportional to 18,874.45, 28,312.08 and 6,866.20 is: 10,299.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,874.45 : 28,312.08 = 6,866.20 : x
  2. Step 2: Convert to fraction form
    18,874.45/28,312.08 = 6,866.20/x
  3. Step 3: Cross multiply
    18,874.45x = 28,312.08 × 6,866.20
  4. Step 4: Simplify right side
    18,874.45x = 194,396,403.70
  5. Step 5: Solve for x
    x = 194,396,403.70/18,874.45
  6. Step 6: Final answer
    x = 10,299.45

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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.