Home / 20,280.12-30,415.49-5,490.18

Finding the Fourth Proportional to 20,280.12, 30,415.49 and 5,490.18

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Solution

The fourth proportional to 20,280.12, 30,415.49 and 5,490.18 is: 8,234.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,280.12 : 30,415.49 = 5,490.18 : x
  2. Step 2: Convert to fraction form
    20,280.12/30,415.49 = 5,490.18/x
  3. Step 3: Cross multiply
    20,280.12x = 30,415.49 × 5,490.18
  4. Step 4: Simplify right side
    20,280.12x = 166,986,487.44
  5. Step 5: Solve for x
    x = 166,986,487.44/20,280.12
  6. Step 6: Final answer
    x = 8,234.00

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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.