Home / 12,261.78-18,235.94-12,130.56

Finding the Fourth Proportional to 12,261.78, 18,235.94 and 12,130.56

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Solution

The fourth proportional to 12,261.78, 18,235.94 and 12,130.56 is: 18,040.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,261.78 : 18,235.94 = 12,130.56 : x
  2. Step 2: Convert to fraction form
    12,261.78/18,235.94 = 12,130.56/x
  3. Step 3: Cross multiply
    12,261.78x = 18,235.94 × 12,130.56
  4. Step 4: Simplify right side
    12,261.78x = 221,212,103.67
  5. Step 5: Solve for x
    x = 221,212,103.67/12,261.78
  6. Step 6: Final answer
    x = 18,040.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.