Home / 12,078.48-18,120.30-3,758.34

Finding the Fourth Proportional to 12,078.48, 18,120.30 and 3,758.34

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Solution

The fourth proportional to 12,078.48, 18,120.30 and 3,758.34 is: 5,638.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,078.48 : 18,120.30 = 3,758.34 : x
  2. Step 2: Convert to fraction form
    12,078.48/18,120.30 = 3,758.34/x
  3. Step 3: Cross multiply
    12,078.48x = 18,120.30 × 3,758.34
  4. Step 4: Simplify right side
    12,078.48x = 68,102,248.30
  5. Step 5: Solve for x
    x = 68,102,248.30/12,078.48
  6. Step 6: Final answer
    x = 5,638.31

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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.