Home / 20,885.19-28,821.60-11,453.82

Finding the Fourth Proportional to 20,885.19, 28,821.60 and 11,453.82

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Solution

The fourth proportional to 20,885.19, 28,821.60 and 11,453.82 is: 15,806.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.19 : 28,821.60 = 11,453.82 : x
  2. Step 2: Convert to fraction form
    20,885.19/28,821.60 = 11,453.82/x
  3. Step 3: Cross multiply
    20,885.19x = 28,821.60 × 11,453.82
  4. Step 4: Simplify right side
    20,885.19x = 330,117,418.51
  5. Step 5: Solve for x
    x = 330,117,418.51/20,885.19
  6. Step 6: Final answer
    x = 15,806.29

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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.