Home / 13,387.71-18,481.47-9,412.23

Finding the Fourth Proportional to 13,387.71, 18,481.47 and 9,412.23

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Solution

The fourth proportional to 13,387.71, 18,481.47 and 9,412.23 is: 12,993.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,387.71 : 18,481.47 = 9,412.23 : x
  2. Step 2: Convert to fraction form
    13,387.71/18,481.47 = 9,412.23/x
  3. Step 3: Cross multiply
    13,387.71x = 18,481.47 × 9,412.23
  4. Step 4: Simplify right side
    13,387.71x = 173,951,846.38
  5. Step 5: Solve for x
    x = 173,951,846.38/13,387.71
  6. Step 6: Final answer
    x = 12,993.40

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Half scale
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Double scale
Find fourth proportional to 13,388.71, 18,482.85 and 9,413.23
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.