Home / 13,780.07-19,016.84-8,402.79

Finding the Fourth Proportional to 13,780.07, 19,016.84 and 8,402.79

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Solution

The fourth proportional to 13,780.07, 19,016.84 and 8,402.79 is: 11,596.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,780.07 : 19,016.84 = 8,402.79 : x
  2. Step 2: Convert to fraction form
    13,780.07/19,016.84 = 8,402.79/x
  3. Step 3: Cross multiply
    13,780.07x = 19,016.84 × 8,402.79
  4. Step 4: Simplify right side
    13,780.07x = 159,794,470.97
  5. Step 5: Solve for x
    x = 159,794,470.97/13,780.07
  6. Step 6: Final answer
    x = 11,596.05

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1.5x scale

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.