Home / 21,825.36-30,119-11,889.36

Finding the Fourth Proportional to 21,825.36, 30,119 and 11,889.36

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Solution

The fourth proportional to 21,825.36, 30,119 and 11,889.36 is: 16,407.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,825.36 : 30,119 = 11,889.36 : x
  2. Step 2: Convert to fraction form
    21,825.36/30,119 = 11,889.36/x
  3. Step 3: Cross multiply
    21,825.36x = 30,119 × 11,889.36
  4. Step 4: Simplify right side
    21,825.36x = 358,095,633.84
  5. Step 5: Solve for x
    x = 358,095,633.84/21,825.36
  6. Step 6: Final answer
    x = 16,407.32

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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.