Home / 21,900.05-30,186.56-17,111.64

Finding the Fourth Proportional to 21,900.05, 30,186.56 and 17,111.64

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Solution

The fourth proportional to 21,900.05, 30,186.56 and 17,111.64 is: 23,586.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,900.05 : 30,186.56 = 17,111.64 : x
  2. Step 2: Convert to fraction form
    21,900.05/30,186.56 = 17,111.64/x
  3. Step 3: Cross multiply
    21,900.05x = 30,186.56 × 17,111.64
  4. Step 4: Simplify right side
    21,900.05x = 516,541,547.56
  5. Step 5: Solve for x
    x = 516,541,547.56/21,900.05
  6. Step 6: Final answer
    x = 23,586.32

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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.