Home / 20,315.88-28,071.24-16,772.88

Finding the Fourth Proportional to 20,315.88, 28,071.24 and 16,772.88

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Solution

The fourth proportional to 20,315.88, 28,071.24 and 16,772.88 is: 23,175.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,315.88 : 28,071.24 = 16,772.88 : x
  2. Step 2: Convert to fraction form
    20,315.88/28,071.24 = 16,772.88/x
  3. Step 3: Cross multiply
    20,315.88x = 28,071.24 × 16,772.88
  4. Step 4: Simplify right side
    20,315.88x = 470,835,539.97
  5. Step 5: Solve for x
    x = 470,835,539.97/20,315.88
  6. Step 6: Final answer
    x = 23,175.74

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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.