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Finding the Fourth Proportional to 18,573.56, 27,859.31 and 13,581.05

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Solution

The fourth proportional to 18,573.56, 27,859.31 and 13,581.05 is: 20,370.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,573.56 : 27,859.31 = 13,581.05 : x
  2. Step 2: Convert to fraction form
    18,573.56/27,859.31 = 13,581.05/x
  3. Step 3: Cross multiply
    18,573.56x = 27,859.31 × 13,581.05
  4. Step 4: Simplify right side
    18,573.56x = 378,358,682.51
  5. Step 5: Solve for x
    x = 378,358,682.51/18,573.56
  6. Step 6: Final answer
    x = 20,370.82

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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.