Home / 20,538.67-30,810.75-7,208.50

Finding the Fourth Proportional to 20,538.67, 30,810.75 and 7,208.50

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Solution

The fourth proportional to 20,538.67, 30,810.75 and 7,208.50 is: 10,813.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,538.67 : 30,810.75 = 7,208.50 : x
  2. Step 2: Convert to fraction form
    20,538.67/30,810.75 = 7,208.50/x
  3. Step 3: Cross multiply
    20,538.67x = 30,810.75 × 7,208.50
  4. Step 4: Simplify right side
    20,538.67x = 222,099,291.38
  5. Step 5: Solve for x
    x = 222,099,291.38/20,538.67
  6. Step 6: Final answer
    x = 10,813.71

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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.