Home / 21,866.63-30,181.41-12,440.66

Finding the Fourth Proportional to 21,866.63, 30,181.41 and 12,440.66

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Solution

The fourth proportional to 21,866.63, 30,181.41 and 12,440.66 is: 17,171.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,866.63 : 30,181.41 = 12,440.66 : x
  2. Step 2: Convert to fraction form
    21,866.63/30,181.41 = 12,440.66/x
  3. Step 3: Cross multiply
    21,866.63x = 30,181.41 × 12,440.66
  4. Step 4: Simplify right side
    21,866.63x = 375,476,509.22
  5. Step 5: Solve for x
    x = 375,476,509.22/21,866.63
  6. Step 6: Final answer
    x = 17,171.21

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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.