Home / 28,675.40-43,015.80-11,146.60

Finding the Fourth Proportional to 28,675.40, 43,015.80 and 11,146.60

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Solution

The fourth proportional to 28,675.40, 43,015.80 and 11,146.60 is: 16,720.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,675.40 : 43,015.80 = 11,146.60 : x
  2. Step 2: Convert to fraction form
    28,675.40/43,015.80 = 11,146.60/x
  3. Step 3: Cross multiply
    28,675.40x = 43,015.80 × 11,146.60
  4. Step 4: Simplify right side
    28,675.40x = 479,479,916.28
  5. Step 5: Solve for x
    x = 479,479,916.28/28,675.40
  6. Step 6: Final answer
    x = 16,720.95

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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.