Home / 19,879.50-27,432.63-11,920.26

Finding the Fourth Proportional to 19,879.50, 27,432.63 and 11,920.26

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Solution

The fourth proportional to 19,879.50, 27,432.63 and 11,920.26 is: 16,449.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,879.50 : 27,432.63 = 11,920.26 : x
  2. Step 2: Convert to fraction form
    19,879.50/27,432.63 = 11,920.26/x
  3. Step 3: Cross multiply
    19,879.50x = 27,432.63 × 11,920.26
  4. Step 4: Simplify right side
    19,879.50x = 327,004,082.08
  5. Step 5: Solve for x
    x = 327,004,082.08/19,879.50
  6. Step 6: Final answer
    x = 16,449.31

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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.