Home / 18,403.80-25,371.73-12,426

Finding the Fourth Proportional to 18,403.80, 25,371.73 and 12,426

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Solution

The fourth proportional to 18,403.80, 25,371.73 and 12,426 is: 17,130.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,403.80 : 25,371.73 = 12,426 : x
  2. Step 2: Convert to fraction form
    18,403.80/25,371.73 = 12,426/x
  3. Step 3: Cross multiply
    18,403.80x = 25,371.73 × 12,426
  4. Step 4: Simplify right side
    18,403.80x = 315,269,116.98
  5. Step 5: Solve for x
    x = 315,269,116.98/18,403.80
  6. Step 6: Final answer
    x = 17,130.65

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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.