Home / 20,762.36-31,138.68-10,221.56

Finding the Fourth Proportional to 20,762.36, 31,138.68 and 10,221.56

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Solution

The fourth proportional to 20,762.36, 31,138.68 and 10,221.56 is: 15,329.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,762.36 : 31,138.68 = 10,221.56 : x
  2. Step 2: Convert to fraction form
    20,762.36/31,138.68 = 10,221.56/x
  3. Step 3: Cross multiply
    20,762.36x = 31,138.68 × 10,221.56
  4. Step 4: Simplify right side
    20,762.36x = 318,285,885.94
  5. Step 5: Solve for x
    x = 318,285,885.94/20,762.36
  6. Step 6: Final answer
    x = 15,329.95

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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.