Home / 20,851.92-31,222.80-14,619.60

Finding the Fourth Proportional to 20,851.92, 31,222.80 and 14,619.60

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Solution

The fourth proportional to 20,851.92, 31,222.80 and 14,619.60 is: 21,890.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,851.92 : 31,222.80 = 14,619.60 : x
  2. Step 2: Convert to fraction form
    20,851.92/31,222.80 = 14,619.60/x
  3. Step 3: Cross multiply
    20,851.92x = 31,222.80 × 14,619.60
  4. Step 4: Simplify right side
    20,851.92x = 456,464,846.88
  5. Step 5: Solve for x
    x = 456,464,846.88/20,851.92
  6. Step 6: Final answer
    x = 21,890.78

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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.