Home / 28,018.44-38,665.22-20,880.36

Finding the Fourth Proportional to 28,018.44, 38,665.22 and 20,880.36

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Solution

The fourth proportional to 28,018.44, 38,665.22 and 20,880.36 is: 28,814.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,018.44 : 38,665.22 = 20,880.36 : x
  2. Step 2: Convert to fraction form
    28,018.44/38,665.22 = 20,880.36/x
  3. Step 3: Cross multiply
    28,018.44x = 38,665.22 × 20,880.36
  4. Step 4: Simplify right side
    28,018.44x = 807,343,713.08
  5. Step 5: Solve for x
    x = 807,343,713.08/28,018.44
  6. Step 6: Final answer
    x = 28,814.73

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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.