Home / 12,865.50-19,157.67-12,392.60

Finding the Fourth Proportional to 12,865.50, 19,157.67 and 12,392.60

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Solution

The fourth proportional to 12,865.50, 19,157.67 and 12,392.60 is: 18,453.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,865.50 : 19,157.67 = 12,392.60 : x
  2. Step 2: Convert to fraction form
    12,865.50/19,157.67 = 12,392.60/x
  3. Step 3: Cross multiply
    12,865.50x = 19,157.67 × 12,392.60
  4. Step 4: Simplify right side
    12,865.50x = 237,413,245.45
  5. Step 5: Solve for x
    x = 237,413,245.45/12,865.50
  6. Step 6: Final answer
    x = 18,453.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.