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Finding the Fourth Proportional to 28,950.40, 43,409.40 and 12,307.60

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Solution

The fourth proportional to 28,950.40, 43,409.40 and 12,307.60 is: 18,454.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,950.40 : 43,409.40 = 12,307.60 : x
  2. Step 2: Convert to fraction form
    28,950.40/43,409.40 = 12,307.60/x
  3. Step 3: Cross multiply
    28,950.40x = 43,409.40 × 12,307.60
  4. Step 4: Simplify right side
    28,950.40x = 534,265,531.44
  5. Step 5: Solve for x
    x = 534,265,531.44/28,950.40
  6. Step 6: Final answer
    x = 18,454.51

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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.