Home / 20,835.33-31,239.10-11,479.74

Finding the Fourth Proportional to 20,835.33, 31,239.10 and 11,479.74

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Solution

The fourth proportional to 20,835.33, 31,239.10 and 11,479.74 is: 17,211.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,835.33 : 31,239.10 = 11,479.74 : x
  2. Step 2: Convert to fraction form
    20,835.33/31,239.10 = 11,479.74/x
  3. Step 3: Cross multiply
    20,835.33x = 31,239.10 × 11,479.74
  4. Step 4: Simplify right side
    20,835.33x = 358,616,745.83
  5. Step 5: Solve for x
    x = 358,616,745.83/20,835.33
  6. Step 6: Final answer
    x = 17,211.95

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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.