Home / 7,858.18-11,787.12-3,178.13

Finding the Fourth Proportional to 7,858.18, 11,787.12 and 3,178.13

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Solution

The fourth proportional to 7,858.18, 11,787.12 and 3,178.13 is: 4,767.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,858.18 : 11,787.12 = 3,178.13 : x
  2. Step 2: Convert to fraction form
    7,858.18/11,787.12 = 3,178.13/x
  3. Step 3: Cross multiply
    7,858.18x = 11,787.12 × 3,178.13
  4. Step 4: Simplify right side
    7,858.18x = 37,460,999.69
  5. Step 5: Solve for x
    x = 37,460,999.69/7,858.18
  6. Step 6: Final answer
    x = 4,767.13

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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.