Home / 20,787.37-31,161.61-7,636.21

Finding the Fourth Proportional to 20,787.37, 31,161.61 and 7,636.21

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Solution

The fourth proportional to 20,787.37, 31,161.61 and 7,636.21 is: 11,447.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,787.37 : 31,161.61 = 7,636.21 : x
  2. Step 2: Convert to fraction form
    20,787.37/31,161.61 = 7,636.21/x
  3. Step 3: Cross multiply
    20,787.37x = 31,161.61 × 7,636.21
  4. Step 4: Simplify right side
    20,787.37x = 237,956,529.54
  5. Step 5: Solve for x
    x = 237,956,529.54/20,787.37
  6. Step 6: Final answer
    x = 11,447.17

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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.