Home / 20,835.99-28,747.98-11,880.23

Finding the Fourth Proportional to 20,835.99, 28,747.98 and 11,880.23

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Solution

The fourth proportional to 20,835.99, 28,747.98 and 11,880.23 is: 16,391.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,835.99 : 28,747.98 = 11,880.23 : x
  2. Step 2: Convert to fraction form
    20,835.99/28,747.98 = 11,880.23/x
  3. Step 3: Cross multiply
    20,835.99x = 28,747.98 × 11,880.23
  4. Step 4: Simplify right side
    20,835.99x = 341,532,470.70
  5. Step 5: Solve for x
    x = 341,532,470.70/20,835.99
  6. Step 6: Final answer
    x = 16,391.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.