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Finding the Fourth Proportional to 28,358.89, 42,544.41 and 8,639.03

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Solution

The fourth proportional to 28,358.89, 42,544.41 and 8,639.03 is: 12,960.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,358.89 : 42,544.41 = 8,639.03 : x
  2. Step 2: Convert to fraction form
    28,358.89/42,544.41 = 8,639.03/x
  3. Step 3: Cross multiply
    28,358.89x = 42,544.41 × 8,639.03
  4. Step 4: Simplify right side
    28,358.89x = 367,542,391.13
  5. Step 5: Solve for x
    x = 367,542,391.13/28,358.89
  6. Step 6: Final answer
    x = 12,960.40

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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.