Home / 20,406.76-28,161.38-11,454.07

Finding the Fourth Proportional to 20,406.76, 28,161.38 and 11,454.07

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Solution

The fourth proportional to 20,406.76, 28,161.38 and 11,454.07 is: 15,806.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,406.76 : 28,161.38 = 11,454.07 : x
  2. Step 2: Convert to fraction form
    20,406.76/28,161.38 = 11,454.07/x
  3. Step 3: Cross multiply
    20,406.76x = 28,161.38 × 11,454.07
  4. Step 4: Simplify right side
    20,406.76x = 322,562,484.56
  5. Step 5: Solve for x
    x = 322,562,484.56/20,406.76
  6. Step 6: Final answer
    x = 15,806.65

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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.