Home / 20,855.76-31,282.83-7,707.84

Finding the Fourth Proportional to 20,855.76, 31,282.83 and 7,707.84

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Solution

The fourth proportional to 20,855.76, 31,282.83 and 7,707.84 is: 11,561.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,855.76 : 31,282.83 = 7,707.84 : x
  2. Step 2: Convert to fraction form
    20,855.76/31,282.83 = 7,707.84/x
  3. Step 3: Cross multiply
    20,855.76x = 31,282.83 × 7,707.84
  4. Step 4: Simplify right side
    20,855.76x = 241,123,048.39
  5. Step 5: Solve for x
    x = 241,123,048.39/20,855.76
  6. Step 6: Final answer
    x = 11,561.46

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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.