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Finding the Fourth Proportional to 18,779.43, 28,172.93 and 6,933.28

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Solution

The fourth proportional to 18,779.43, 28,172.93 and 6,933.28 is: 10,401.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,779.43 : 28,172.93 = 6,933.28 : x
  2. Step 2: Convert to fraction form
    18,779.43/28,172.93 = 6,933.28/x
  3. Step 3: Cross multiply
    18,779.43x = 28,172.93 × 6,933.28
  4. Step 4: Simplify right side
    18,779.43x = 195,330,798.84
  5. Step 5: Solve for x
    x = 195,330,798.84/18,779.43
  6. Step 6: Final answer
    x = 10,401.32

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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.