Home / 39,415.50-54,394.55-21,511.65

Finding the Fourth Proportional to 39,415.50, 54,394.55 and 21,511.65

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Solution

The fourth proportional to 39,415.50, 54,394.55 and 21,511.65 is: 29,686.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,415.50 : 54,394.55 = 21,511.65 : x
  2. Step 2: Convert to fraction form
    39,415.50/54,394.55 = 21,511.65/x
  3. Step 3: Cross multiply
    39,415.50x = 54,394.55 × 21,511.65
  4. Step 4: Simplify right side
    39,415.50x = 1,170,116,413.95
  5. Step 5: Solve for x
    x = 1,170,116,413.95/39,415.50
  6. Step 6: Final answer
    x = 29,686.71

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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.