Home / 28,857.77-43,301.88-20,478.41

Finding the Fourth Proportional to 28,857.77, 43,301.88 and 20,478.41

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Solution

The fourth proportional to 28,857.77, 43,301.88 and 20,478.41 is: 30,728.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,857.77 : 43,301.88 = 20,478.41 : x
  2. Step 2: Convert to fraction form
    28,857.77/43,301.88 = 20,478.41/x
  3. Step 3: Cross multiply
    28,857.77x = 43,301.88 × 20,478.41
  4. Step 4: Simplify right side
    28,857.77x = 886,753,652.41
  5. Step 5: Solve for x
    x = 886,753,652.41/28,857.77
  6. Step 6: Final answer
    x = 30,728.42

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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.