Home / 20,938.23-31,413.45-8,451.87

Finding the Fourth Proportional to 20,938.23, 31,413.45 and 8,451.87

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Solution

The fourth proportional to 20,938.23, 31,413.45 and 8,451.87 is: 12,680.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,938.23 : 31,413.45 = 8,451.87 : x
  2. Step 2: Convert to fraction form
    20,938.23/31,413.45 = 8,451.87/x
  3. Step 3: Cross multiply
    20,938.23x = 31,413.45 × 8,451.87
  4. Step 4: Simplify right side
    20,938.23x = 265,502,395.65
  5. Step 5: Solve for x
    x = 265,502,395.65/20,938.23
  6. Step 6: Final answer
    x = 12,680.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.