Home / 21,853.77-30,164.99-16,812.05

Finding the Fourth Proportional to 21,853.77, 30,164.99 and 16,812.05

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Solution

The fourth proportional to 21,853.77, 30,164.99 and 16,812.05 is: 23,205.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,853.77 : 30,164.99 = 16,812.05 : x
  2. Step 2: Convert to fraction form
    21,853.77/30,164.99 = 16,812.05/x
  3. Step 3: Cross multiply
    21,853.77x = 30,164.99 × 16,812.05
  4. Step 4: Simplify right side
    21,853.77x = 507,135,399.21
  5. Step 5: Solve for x
    x = 507,135,399.21/21,853.77
  6. Step 6: Final answer
    x = 23,205.86

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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.