Home / 21,077.85-29,096.91-13,424.43

Finding the Fourth Proportional to 21,077.85, 29,096.91 and 13,424.43

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Solution

The fourth proportional to 21,077.85, 29,096.91 and 13,424.43 is: 18,531.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,077.85 : 29,096.91 = 13,424.43 : x
  2. Step 2: Convert to fraction form
    21,077.85/29,096.91 = 13,424.43/x
  3. Step 3: Cross multiply
    21,077.85x = 29,096.91 × 13,424.43
  4. Step 4: Simplify right side
    21,077.85x = 390,609,431.51
  5. Step 5: Solve for x
    x = 390,609,431.51/21,077.85
  6. Step 6: Final answer
    x = 18,531.75

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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.