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Finding the Fourth Proportional to 18,829.15, 28,243.93 and 5,681.64

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Solution

The fourth proportional to 18,829.15, 28,243.93 and 5,681.64 is: 8,522.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,829.15 : 28,243.93 = 5,681.64 : x
  2. Step 2: Convert to fraction form
    18,829.15/28,243.93 = 5,681.64/x
  3. Step 3: Cross multiply
    18,829.15x = 28,243.93 × 5,681.64
  4. Step 4: Simplify right side
    18,829.15x = 160,471,842.45
  5. Step 5: Solve for x
    x = 160,471,842.45/18,829.15
  6. Step 6: Final answer
    x = 8,522.52

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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.