Home / 13,431.80-20,115.30-12,848.60

Finding the Fourth Proportional to 13,431.80, 20,115.30 and 12,848.60

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Solution

The fourth proportional to 13,431.80, 20,115.30 and 12,848.60 is: 19,241.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,431.80 : 20,115.30 = 12,848.60 : x
  2. Step 2: Convert to fraction form
    13,431.80/20,115.30 = 12,848.60/x
  3. Step 3: Cross multiply
    13,431.80x = 20,115.30 × 12,848.60
  4. Step 4: Simplify right side
    13,431.80x = 258,453,443.58
  5. Step 5: Solve for x
    x = 258,453,443.58/13,431.80
  6. Step 6: Final answer
    x = 19,241.91

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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.