Home / 18,781.88-25,920.61-10,400.00

Finding the Fourth Proportional to 18,781.88, 25,920.61 and 10,400.00

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Solution

The fourth proportional to 18,781.88, 25,920.61 and 10,400.00 is: 14,352.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,781.88 : 25,920.61 = 10,400.00 : x
  2. Step 2: Convert to fraction form
    18,781.88/25,920.61 = 10,400.00/x
  3. Step 3: Cross multiply
    18,781.88x = 25,920.61 × 10,400.00
  4. Step 4: Simplify right side
    18,781.88x = 269,574,188.40
  5. Step 5: Solve for x
    x = 269,574,188.40/18,781.88
  6. Step 6: Final answer
    x = 14,352.89

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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.