Home / 21,900.12-30,186.66-17,111.69

Finding the Fourth Proportional to 21,900.12, 30,186.66 and 17,111.69

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Solution

The fourth proportional to 21,900.12, 30,186.66 and 17,111.69 is: 23,586.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,900.12 : 30,186.66 = 17,111.69 : x
  2. Step 2: Convert to fraction form
    21,900.12/30,186.66 = 17,111.69/x
  3. Step 3: Cross multiply
    21,900.12x = 30,186.66 × 17,111.69
  4. Step 4: Simplify right side
    21,900.12x = 516,544,768.06
  5. Step 5: Solve for x
    x = 516,544,768.06/21,900.12
  6. Step 6: Final answer
    x = 23,586.39

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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.