Home / 12,731.39-19,069.40-7,786.07

Finding the Fourth Proportional to 12,731.39, 19,069.40 and 7,786.07

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Solution

The fourth proportional to 12,731.39, 19,069.40 and 7,786.07 is: 11,662.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,731.39 : 19,069.40 = 7,786.07 : x
  2. Step 2: Convert to fraction form
    12,731.39/19,069.40 = 7,786.07/x
  3. Step 3: Cross multiply
    12,731.39x = 19,069.40 × 7,786.07
  4. Step 4: Simplify right side
    12,731.39x = 148,475,607.38
  5. Step 5: Solve for x
    x = 148,475,607.38/12,731.39
  6. Step 6: Final answer
    x = 11,662.17

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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.