Home / 12,859.30-19,278.57-11,821.33

Finding the Fourth Proportional to 12,859.30, 19,278.57 and 11,821.33

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Solution

The fourth proportional to 12,859.30, 19,278.57 and 11,821.33 is: 17,722.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,859.30 : 19,278.57 = 11,821.33 : x
  2. Step 2: Convert to fraction form
    12,859.30/19,278.57 = 11,821.33/x
  3. Step 3: Cross multiply
    12,859.30x = 19,278.57 × 11,821.33
  4. Step 4: Simplify right side
    12,859.30x = 227,898,419.88
  5. Step 5: Solve for x
    x = 227,898,419.88/12,859.30
  6. Step 6: Final answer
    x = 17,722.46

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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.