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Finding the Fourth Proportional to 18,581.94, 27,881.01 and 8,720.46

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Solution

The fourth proportional to 18,581.94, 27,881.01 and 8,720.46 is: 13,084.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,581.94 : 27,881.01 = 8,720.46 : x
  2. Step 2: Convert to fraction form
    18,581.94/27,881.01 = 8,720.46/x
  3. Step 3: Cross multiply
    18,581.94x = 27,881.01 × 8,720.46
  4. Step 4: Simplify right side
    18,581.94x = 243,135,232.46
  5. Step 5: Solve for x
    x = 243,135,232.46/18,581.94
  6. Step 6: Final answer
    x = 13,084.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.