Home / 20,688.89-31,033.33-12,371.30

Finding the Fourth Proportional to 20,688.89, 31,033.33 and 12,371.30

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Solution

The fourth proportional to 20,688.89, 31,033.33 and 12,371.30 is: 18,556.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.89 : 31,033.33 = 12,371.30 : x
  2. Step 2: Convert to fraction form
    20,688.89/31,033.33 = 12,371.30/x
  3. Step 3: Cross multiply
    20,688.89x = 31,033.33 × 12,371.30
  4. Step 4: Simplify right side
    20,688.89x = 383,922,565.71
  5. Step 5: Solve for x
    x = 383,922,565.71/20,688.89
  6. Step 6: Final answer
    x = 18,556.95

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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.