Home / 12,520.49-18,787.20-5,505.42

Finding the Fourth Proportional to 12,520.49, 18,787.20 and 5,505.42

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Solution

The fourth proportional to 12,520.49, 18,787.20 and 5,505.42 is: 8,260.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,520.49 : 18,787.20 = 5,505.42 : x
  2. Step 2: Convert to fraction form
    12,520.49/18,787.20 = 5,505.42/x
  3. Step 3: Cross multiply
    12,520.49x = 18,787.20 × 5,505.42
  4. Step 4: Simplify right side
    12,520.49x = 103,431,426.62
  5. Step 5: Solve for x
    x = 103,431,426.62/12,520.49
  6. Step 6: Final answer
    x = 8,260.98

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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.