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Finding the Fourth Proportional to 18,643.86, 27,975.51 and 7,558.74

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Solution

The fourth proportional to 18,643.86, 27,975.51 and 7,558.74 is: 11,342.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,643.86 : 27,975.51 = 7,558.74 : x
  2. Step 2: Convert to fraction form
    18,643.86/27,975.51 = 7,558.74/x
  3. Step 3: Cross multiply
    18,643.86x = 27,975.51 × 7,558.74
  4. Step 4: Simplify right side
    18,643.86x = 211,459,606.46
  5. Step 5: Solve for x
    x = 211,459,606.46/18,643.86
  6. Step 6: Final answer
    x = 11,342.05

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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.