Home / 12,687.20-19,014.60-9,220.40

Finding the Fourth Proportional to 12,687.20, 19,014.60 and 9,220.40

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Solution

The fourth proportional to 12,687.20, 19,014.60 and 9,220.40 is: 13,818.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,687.20 : 19,014.60 = 9,220.40 : x
  2. Step 2: Convert to fraction form
    12,687.20/19,014.60 = 9,220.40/x
  3. Step 3: Cross multiply
    12,687.20x = 19,014.60 × 9,220.40
  4. Step 4: Simplify right side
    12,687.20x = 175,322,217.84
  5. Step 5: Solve for x
    x = 175,322,217.84/12,687.20
  6. Step 6: Final answer
    x = 13,818.83

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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.