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Finding the Fourth Proportional to 18,387.64, 27,581.52 and 4,536.64

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Solution

The fourth proportional to 18,387.64, 27,581.52 and 4,536.64 is: 6,804.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,387.64 : 27,581.52 = 4,536.64 : x
  2. Step 2: Convert to fraction form
    18,387.64/27,581.52 = 4,536.64/x
  3. Step 3: Cross multiply
    18,387.64x = 27,581.52 × 4,536.64
  4. Step 4: Simplify right side
    18,387.64x = 125,127,426.89
  5. Step 5: Solve for x
    x = 125,127,426.89/18,387.64
  6. Step 6: Final answer
    x = 6,804.97

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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.