Home / 12,786.81-17,655.08-11,015.34

Finding the Fourth Proportional to 12,786.81, 17,655.08 and 11,015.34

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Solution

The fourth proportional to 12,786.81, 17,655.08 and 11,015.34 is: 15,209.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,786.81 : 17,655.08 = 11,015.34 : x
  2. Step 2: Convert to fraction form
    12,786.81/17,655.08 = 11,015.34/x
  3. Step 3: Cross multiply
    12,786.81x = 17,655.08 × 11,015.34
  4. Step 4: Simplify right side
    12,786.81x = 194,476,653.85
  5. Step 5: Solve for x
    x = 194,476,653.85/12,786.81
  6. Step 6: Final answer
    x = 15,209.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.