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Finding the Fourth Proportional to 28,758.88, 43,140.18 and 9,038.26

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Solution

The fourth proportional to 28,758.88, 43,140.18 and 9,038.26 is: 13,557.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,758.88 : 43,140.18 = 9,038.26 : x
  2. Step 2: Convert to fraction form
    28,758.88/43,140.18 = 9,038.26/x
  3. Step 3: Cross multiply
    28,758.88x = 43,140.18 × 9,038.26
  4. Step 4: Simplify right side
    28,758.88x = 389,912,163.29
  5. Step 5: Solve for x
    x = 389,912,163.29/28,758.88
  6. Step 6: Final answer
    x = 13,557.97

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.