Home / 12,830.40-19,231.20-5,433.60

Finding the Fourth Proportional to 12,830.40, 19,231.20 and 5,433.60

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Solution

The fourth proportional to 12,830.40, 19,231.20 and 5,433.60 is: 8,144.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,830.40 : 19,231.20 = 5,433.60 : x
  2. Step 2: Convert to fraction form
    12,830.40/19,231.20 = 5,433.60/x
  3. Step 3: Cross multiply
    12,830.40x = 19,231.20 × 5,433.60
  4. Step 4: Simplify right side
    12,830.40x = 104,494,648.32
  5. Step 5: Solve for x
    x = 104,494,648.32/12,830.40
  6. Step 6: Final answer
    x = 8,144.30

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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.