Home / 12,120.77-18,181.16-3,801.52

Finding the Fourth Proportional to 12,120.77, 18,181.16 and 3,801.52

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Solution

The fourth proportional to 12,120.77, 18,181.16 and 3,801.52 is: 5,702.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.77 : 18,181.16 = 3,801.52 : x
  2. Step 2: Convert to fraction form
    12,120.77/18,181.16 = 3,801.52/x
  3. Step 3: Cross multiply
    12,120.77x = 18,181.16 × 3,801.52
  4. Step 4: Simplify right side
    12,120.77x = 69,116,061.34
  5. Step 5: Solve for x
    x = 69,116,061.34/12,120.77
  6. Step 6: Final answer
    x = 5,702.28

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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.