Home / 28,412.76-39,160.62-21,326.88

Finding the Fourth Proportional to 28,412.76, 39,160.62 and 21,326.88

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Solution

The fourth proportional to 28,412.76, 39,160.62 and 21,326.88 is: 29,394.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,412.76 : 39,160.62 = 21,326.88 : x
  2. Step 2: Convert to fraction form
    28,412.76/39,160.62 = 21,326.88/x
  3. Step 3: Cross multiply
    28,412.76x = 39,160.62 × 21,326.88
  4. Step 4: Simplify right side
    28,412.76x = 835,173,843.47
  5. Step 5: Solve for x
    x = 835,173,843.47/28,412.76
  6. Step 6: Final answer
    x = 29,394.32

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Half scale
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Double scale
Find fourth proportional to 28,413.76, 39,162 and 21,327.88
Similar ratio
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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.