Home / 28,916.80-43,375.20-21,043.60

Finding the Fourth Proportional to 28,916.80, 43,375.20 and 21,043.60

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Solution

The fourth proportional to 28,916.80, 43,375.20 and 21,043.60 is: 31,565.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,916.80 : 43,375.20 = 21,043.60 : x
  2. Step 2: Convert to fraction form
    28,916.80/43,375.20 = 21,043.60/x
  3. Step 3: Cross multiply
    28,916.80x = 43,375.20 × 21,043.60
  4. Step 4: Simplify right side
    28,916.80x = 912,770,358.72
  5. Step 5: Solve for x
    x = 912,770,358.72/28,916.80
  6. Step 6: Final answer
    x = 31,565.40

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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.