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Finding the Fourth Proportional to 18,390.50, 27,585.82 and 4,539.50

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Solution

The fourth proportional to 18,390.50, 27,585.82 and 4,539.50 is: 6,809.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,390.50 : 27,585.82 = 4,539.50 : x
  2. Step 2: Convert to fraction form
    18,390.50/27,585.82 = 4,539.50/x
  3. Step 3: Cross multiply
    18,390.50x = 27,585.82 × 4,539.50
  4. Step 4: Simplify right side
    18,390.50x = 125,225,829.89
  5. Step 5: Solve for x
    x = 125,225,829.89/18,390.50
  6. Step 6: Final answer
    x = 6,809.27

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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.