Home / 20,379.96-28,124.01-11,427.45

Finding the Fourth Proportional to 20,379.96, 28,124.01 and 11,427.45

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Solution

The fourth proportional to 20,379.96, 28,124.01 and 11,427.45 is: 15,769.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,379.96 : 28,124.01 = 11,427.45 : x
  2. Step 2: Convert to fraction form
    20,379.96/28,124.01 = 11,427.45/x
  3. Step 3: Cross multiply
    20,379.96x = 28,124.01 × 11,427.45
  4. Step 4: Simplify right side
    20,379.96x = 321,385,718.07
  5. Step 5: Solve for x
    x = 321,385,718.07/20,379.96
  6. Step 6: Final answer
    x = 15,769.69

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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.