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Finding the Fourth Proportional to 28,993.12, 43,490.08 and 8,216.60

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Solution

The fourth proportional to 28,993.12, 43,490.08 and 8,216.60 is: 12,325.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,993.12 : 43,490.08 = 8,216.60 : x
  2. Step 2: Convert to fraction form
    28,993.12/43,490.08 = 8,216.60/x
  3. Step 3: Cross multiply
    28,993.12x = 43,490.08 × 8,216.60
  4. Step 4: Simplify right side
    28,993.12x = 357,340,591.33
  5. Step 5: Solve for x
    x = 357,340,591.33/28,993.12
  6. Step 6: Final answer
    x = 12,325.01

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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.