Home / 20,855.05-31,277.10-7,711.18

Finding the Fourth Proportional to 20,855.05, 31,277.10 and 7,711.18

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Solution

The fourth proportional to 20,855.05, 31,277.10 and 7,711.18 is: 11,564.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,855.05 : 31,277.10 = 7,711.18 : x
  2. Step 2: Convert to fraction form
    20,855.05/31,277.10 = 7,711.18/x
  3. Step 3: Cross multiply
    20,855.05x = 31,277.10 × 7,711.18
  4. Step 4: Simplify right side
    20,855.05x = 241,183,347.98
  5. Step 5: Solve for x
    x = 241,183,347.98/20,855.05
  6. Step 6: Final answer
    x = 11,564.75

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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.