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Finding the Fourth Proportional to 18,390.56, 27,582.53 and 7,866.50

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Solution

The fourth proportional to 18,390.56, 27,582.53 and 7,866.50 is: 11,798.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,390.56 : 27,582.53 = 7,866.50 : x
  2. Step 2: Convert to fraction form
    18,390.56/27,582.53 = 7,866.50/x
  3. Step 3: Cross multiply
    18,390.56x = 27,582.53 × 7,866.50
  4. Step 4: Simplify right side
    18,390.56x = 216,977,795.00
  5. Step 5: Solve for x
    x = 216,977,795.00/18,390.56
  6. Step 6: Final answer
    x = 11,798.33

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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.