Home / 20,828.30-28,732.32-14,111.64

Finding the Fourth Proportional to 20,828.30, 28,732.32 and 14,111.64

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Solution

The fourth proportional to 20,828.30, 28,732.32 and 14,111.64 is: 19,466.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.30 : 28,732.32 = 14,111.64 : x
  2. Step 2: Convert to fraction form
    20,828.30/28,732.32 = 14,111.64/x
  3. Step 3: Cross multiply
    20,828.30x = 28,732.32 × 14,111.64
  4. Step 4: Simplify right side
    20,828.30x = 405,460,156.20
  5. Step 5: Solve for x
    x = 405,460,156.20/20,828.30
  6. Step 6: Final answer
    x = 19,466.80

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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.