Home / 20,788.37-31,163.11-7,637.21

Finding the Fourth Proportional to 20,788.37, 31,163.11 and 7,637.21

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Solution

The fourth proportional to 20,788.37, 31,163.11 and 7,637.21 is: 11,448.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.37 : 31,163.11 = 7,637.21 : x
  2. Step 2: Convert to fraction form
    20,788.37/31,163.11 = 7,637.21/x
  3. Step 3: Cross multiply
    20,788.37x = 31,163.11 × 7,637.21
  4. Step 4: Simplify right side
    20,788.37x = 237,999,215.32
  5. Step 5: Solve for x
    x = 237,999,215.32/20,788.37
  6. Step 6: Final answer
    x = 11,448.67

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1.5x scale

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.