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Finding the Fourth Proportional to 18,390, 27,585.56 and 4,539

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Solution

The fourth proportional to 18,390, 27,585.56 and 4,539 is: 6,808.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,390 : 27,585.56 = 4,539 : x
  2. Step 2: Convert to fraction form
    18,390/27,585.56 = 4,539/x
  3. Step 3: Cross multiply
    18,390x = 27,585.56 × 4,539
  4. Step 4: Simplify right side
    18,390x = 125,210,856.84
  5. Step 5: Solve for x
    x = 125,210,856.84/18,390
  6. Step 6: Final answer
    x = 6,808.64

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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.