Home / 12,221.75-18,314.40-7,835.60

Finding the Fourth Proportional to 12,221.75, 18,314.40 and 7,835.60

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Solution

The fourth proportional to 12,221.75, 18,314.40 and 7,835.60 is: 11,741.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,221.75 : 18,314.40 = 7,835.60 : x
  2. Step 2: Convert to fraction form
    12,221.75/18,314.40 = 7,835.60/x
  3. Step 3: Cross multiply
    12,221.75x = 18,314.40 × 7,835.60
  4. Step 4: Simplify right side
    12,221.75x = 143,504,312.64
  5. Step 5: Solve for x
    x = 143,504,312.64/12,221.75
  6. Step 6: Final answer
    x = 11,741.72

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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.