Home / 13,078.40-19,639.46-12,976.34

Finding the Fourth Proportional to 13,078.40, 19,639.46 and 12,976.34

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Solution

The fourth proportional to 13,078.40, 19,639.46 and 12,976.34 is: 19,486.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,078.40 : 19,639.46 = 12,976.34 : x
  2. Step 2: Convert to fraction form
    13,078.40/19,639.46 = 12,976.34/x
  3. Step 3: Cross multiply
    13,078.40x = 19,639.46 × 12,976.34
  4. Step 4: Simplify right side
    13,078.40x = 254,848,244.62
  5. Step 5: Solve for x
    x = 254,848,244.62/13,078.40
  6. Step 6: Final answer
    x = 19,486.20

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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.