Home / 21,319.13-29,419.31-11,885.87

Finding the Fourth Proportional to 21,319.13, 29,419.31 and 11,885.87

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Solution

The fourth proportional to 21,319.13, 29,419.31 and 11,885.87 is: 16,401.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,319.13 : 29,419.31 = 11,885.87 : x
  2. Step 2: Convert to fraction form
    21,319.13/29,419.31 = 11,885.87/x
  3. Step 3: Cross multiply
    21,319.13x = 29,419.31 × 11,885.87
  4. Step 4: Simplify right side
    21,319.13x = 349,674,197.41
  5. Step 5: Solve for x
    x = 349,674,197.41/21,319.13
  6. Step 6: Final answer
    x = 16,401.90

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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.