Home / 20,391.19-28,141.26-11,317.01

Finding the Fourth Proportional to 20,391.19, 28,141.26 and 11,317.01

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Solution

The fourth proportional to 20,391.19, 28,141.26 and 11,317.01 is: 15,618.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,391.19 : 28,141.26 = 11,317.01 : x
  2. Step 2: Convert to fraction form
    20,391.19/28,141.26 = 11,317.01/x
  3. Step 3: Cross multiply
    20,391.19x = 28,141.26 × 11,317.01
  4. Step 4: Simplify right side
    20,391.19x = 318,474,920.83
  5. Step 5: Solve for x
    x = 318,474,920.83/20,391.19
  6. Step 6: Final answer
    x = 15,618.26

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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.