Home / 19,865.21-27,406.35-11,365.61

Finding the Fourth Proportional to 19,865.21, 27,406.35 and 11,365.61

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Solution

The fourth proportional to 19,865.21, 27,406.35 and 11,365.61 is: 15,680.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,865.21 : 27,406.35 = 11,365.61 : x
  2. Step 2: Convert to fraction form
    19,865.21/27,406.35 = 11,365.61/x
  3. Step 3: Cross multiply
    19,865.21x = 27,406.35 × 11,365.61
  4. Step 4: Simplify right side
    19,865.21x = 311,489,885.62
  5. Step 5: Solve for x
    x = 311,489,885.62/19,865.21
  6. Step 6: Final answer
    x = 15,680.17

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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.