Home / 12,214.40-18,321.60-7,840.40

Finding the Fourth Proportional to 12,214.40, 18,321.60 and 7,840.40

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Solution

The fourth proportional to 12,214.40, 18,321.60 and 7,840.40 is: 11,760.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,214.40 : 18,321.60 = 7,840.40 : x
  2. Step 2: Convert to fraction form
    12,214.40/18,321.60 = 7,840.40/x
  3. Step 3: Cross multiply
    12,214.40x = 18,321.60 × 7,840.40
  4. Step 4: Simplify right side
    12,214.40x = 143,648,672.64
  5. Step 5: Solve for x
    x = 143,648,672.64/12,214.40
  6. Step 6: Final answer
    x = 11,760.60

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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.