Home / 20,775.69-31,135.59-7,615.62

Finding the Fourth Proportional to 20,775.69, 31,135.59 and 7,615.62

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Solution

The fourth proportional to 20,775.69, 31,135.59 and 7,615.62 is: 11,413.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,775.69 : 31,135.59 = 7,615.62 : x
  2. Step 2: Convert to fraction form
    20,775.69/31,135.59 = 7,615.62/x
  3. Step 3: Cross multiply
    20,775.69x = 31,135.59 × 7,615.62
  4. Step 4: Simplify right side
    20,775.69x = 237,116,821.92
  5. Step 5: Solve for x
    x = 237,116,821.92/20,775.69
  6. Step 6: Final answer
    x = 11,413.19

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1.5x scale

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.