Home / 28,109.09-38,791.05-15,362.81

Finding the Fourth Proportional to 28,109.09, 38,791.05 and 15,362.81

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Solution

The fourth proportional to 28,109.09, 38,791.05 and 15,362.81 is: 21,200.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,109.09 : 38,791.05 = 15,362.81 : x
  2. Step 2: Convert to fraction form
    28,109.09/38,791.05 = 15,362.81/x
  3. Step 3: Cross multiply
    28,109.09x = 38,791.05 × 15,362.81
  4. Step 4: Simplify right side
    28,109.09x = 595,939,530.85
  5. Step 5: Solve for x
    x = 595,939,530.85/28,109.09
  6. Step 6: Final answer
    x = 21,200.96

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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.