Home / 20,890.37-28,830.23-11,937.68

Finding the Fourth Proportional to 20,890.37, 28,830.23 and 11,937.68

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Solution

The fourth proportional to 20,890.37, 28,830.23 and 11,937.68 is: 16,474.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890.37 : 28,830.23 = 11,937.68 : x
  2. Step 2: Convert to fraction form
    20,890.37/28,830.23 = 11,937.68/x
  3. Step 3: Cross multiply
    20,890.37x = 28,830.23 × 11,937.68
  4. Step 4: Simplify right side
    20,890.37x = 344,166,060.07
  5. Step 5: Solve for x
    x = 344,166,060.07/20,890.37
  6. Step 6: Final answer
    x = 16,474.87

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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.