Home / 20,853.09-28,774.53-11,900.07

Finding the Fourth Proportional to 20,853.09, 28,774.53 and 11,900.07

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Solution

The fourth proportional to 20,853.09, 28,774.53 and 11,900.07 is: 16,420.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,853.09 : 28,774.53 = 11,900.07 : x
  2. Step 2: Convert to fraction form
    20,853.09/28,774.53 = 11,900.07/x
  3. Step 3: Cross multiply
    20,853.09x = 28,774.53 × 11,900.07
  4. Step 4: Simplify right side
    20,853.09x = 342,418,921.22
  5. Step 5: Solve for x
    x = 342,418,921.22/20,853.09
  6. Step 6: Final answer
    x = 16,420.54

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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.