Home / 28,520.25-39,357.67-15,774

Finding the Fourth Proportional to 28,520.25, 39,357.67 and 15,774

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Solution

The fourth proportional to 28,520.25, 39,357.67 and 15,774 is: 21,767.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,520.25 : 39,357.67 = 15,774 : x
  2. Step 2: Convert to fraction form
    28,520.25/39,357.67 = 15,774/x
  3. Step 3: Cross multiply
    28,520.25x = 39,357.67 × 15,774
  4. Step 4: Simplify right side
    28,520.25x = 620,827,886.58
  5. Step 5: Solve for x
    x = 620,827,886.58/28,520.25
  6. Step 6: Final answer
    x = 21,767.97

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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.