Home / 7,858.38-11,787.54-3,178.34

Finding the Fourth Proportional to 7,858.38, 11,787.54 and 3,178.34

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Solution

The fourth proportional to 7,858.38, 11,787.54 and 3,178.34 is: 4,767.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,858.38 : 11,787.54 = 3,178.34 : x
  2. Step 2: Convert to fraction form
    7,858.38/11,787.54 = 3,178.34/x
  3. Step 3: Cross multiply
    7,858.38x = 11,787.54 × 3,178.34
  4. Step 4: Simplify right side
    7,858.38x = 37,464,783.23
  5. Step 5: Solve for x
    x = 37,464,783.23/7,858.38
  6. Step 6: Final answer
    x = 4,767.49

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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.