Home / 13,840.40-20,760.60-12,771.20

Finding the Fourth Proportional to 13,840.40, 20,760.60 and 12,771.20

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Solution

The fourth proportional to 13,840.40, 20,760.60 and 12,771.20 is: 19,156.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,840.40 : 20,760.60 = 12,771.20 : x
  2. Step 2: Convert to fraction form
    13,840.40/20,760.60 = 12,771.20/x
  3. Step 3: Cross multiply
    13,840.40x = 20,760.60 × 12,771.20
  4. Step 4: Simplify right side
    13,840.40x = 265,137,774.72
  5. Step 5: Solve for x
    x = 265,137,774.72/13,840.40
  6. Step 6: Final answer
    x = 19,156.80

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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.