Home / 20,788.56-31,163.39-7,637.40

Finding the Fourth Proportional to 20,788.56, 31,163.39 and 7,637.40

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Solution

The fourth proportional to 20,788.56, 31,163.39 and 7,637.40 is: 11,448.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.56 : 31,163.39 = 7,637.40 : x
  2. Step 2: Convert to fraction form
    20,788.56/31,163.39 = 7,637.40/x
  3. Step 3: Cross multiply
    20,788.56x = 31,163.39 × 7,637.40
  4. Step 4: Simplify right side
    20,788.56x = 238,007,274.79
  5. Step 5: Solve for x
    x = 238,007,274.79/20,788.56
  6. Step 6: Final answer
    x = 11,448.95

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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.