Home / 28,455.22-39,269.91-15,880.78

Finding the Fourth Proportional to 28,455.22, 39,269.91 and 15,880.78

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Solution

The fourth proportional to 28,455.22, 39,269.91 and 15,880.78 is: 21,916.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,455.22 : 39,269.91 = 15,880.78 : x
  2. Step 2: Convert to fraction form
    28,455.22/39,269.91 = 15,880.78/x
  3. Step 3: Cross multiply
    28,455.22x = 39,269.91 × 15,880.78
  4. Step 4: Simplify right side
    28,455.22x = 623,636,801.33
  5. Step 5: Solve for x
    x = 623,636,801.33/28,455.22
  6. Step 6: Final answer
    x = 21,916.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.