Home / 21,042.12-31,541.85-13,651.29

Finding the Fourth Proportional to 21,042.12, 31,541.85 and 13,651.29

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Solution

The fourth proportional to 21,042.12, 31,541.85 and 13,651.29 is: 20,463.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,042.12 : 31,541.85 = 13,651.29 : x
  2. Step 2: Convert to fraction form
    21,042.12/31,541.85 = 13,651.29/x
  3. Step 3: Cross multiply
    21,042.12x = 31,541.85 × 13,651.29
  4. Step 4: Simplify right side
    21,042.12x = 430,586,941.49
  5. Step 5: Solve for x
    x = 430,586,941.49/21,042.12
  6. Step 6: Final answer
    x = 20,463.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.