Home / 21,313.38-29,411.85-13,359.99

Finding the Fourth Proportional to 21,313.38, 29,411.85 and 13,359.99

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Solution

The fourth proportional to 21,313.38, 29,411.85 and 13,359.99 is: 18,436.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,313.38 : 29,411.85 = 13,359.99 : x
  2. Step 2: Convert to fraction form
    21,313.38/29,411.85 = 13,359.99/x
  3. Step 3: Cross multiply
    21,313.38x = 29,411.85 × 13,359.99
  4. Step 4: Simplify right side
    21,313.38x = 392,942,021.88
  5. Step 5: Solve for x
    x = 392,942,021.88/21,313.38
  6. Step 6: Final answer
    x = 18,436.40

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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.