Home / 12,838.40-19,243.20-5,441.60

Finding the Fourth Proportional to 12,838.40, 19,243.20 and 5,441.60

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Solution

The fourth proportional to 12,838.40, 19,243.20 and 5,441.60 is: 8,156.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,838.40 : 19,243.20 = 5,441.60 : x
  2. Step 2: Convert to fraction form
    12,838.40/19,243.20 = 5,441.60/x
  3. Step 3: Cross multiply
    12,838.40x = 19,243.20 × 5,441.60
  4. Step 4: Simplify right side
    12,838.40x = 104,713,797.12
  5. Step 5: Solve for x
    x = 104,713,797.12/12,838.40
  6. Step 6: Final answer
    x = 8,156.30

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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.