Home / 12,731.64-19,069.78-7,786.32

Finding the Fourth Proportional to 12,731.64, 19,069.78 and 7,786.32

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Solution

The fourth proportional to 12,731.64, 19,069.78 and 7,786.32 is: 11,662.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,731.64 : 19,069.78 = 7,786.32 : x
  2. Step 2: Convert to fraction form
    12,731.64/19,069.78 = 7,786.32/x
  3. Step 3: Cross multiply
    12,731.64x = 19,069.78 × 7,786.32
  4. Step 4: Simplify right side
    12,731.64x = 148,483,409.41
  5. Step 5: Solve for x
    x = 148,483,409.41/12,731.64
  6. Step 6: Final answer
    x = 11,662.55

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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.