Home / 21,856.36-30,157.26-13,895.68

Finding the Fourth Proportional to 21,856.36, 30,157.26 and 13,895.68

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Solution

The fourth proportional to 21,856.36, 30,157.26 and 13,895.68 is: 19,173.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,856.36 : 30,157.26 = 13,895.68 : x
  2. Step 2: Convert to fraction form
    21,856.36/30,157.26 = 13,895.68/x
  3. Step 3: Cross multiply
    21,856.36x = 30,157.26 × 13,895.68
  4. Step 4: Simplify right side
    21,856.36x = 419,055,634.64
  5. Step 5: Solve for x
    x = 419,055,634.64/21,856.36
  6. Step 6: Final answer
    x = 19,173.17

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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.