Home / 28,412.32-39,162-18,977.44

Finding the Fourth Proportional to 28,412.32, 39,162 and 18,977.44

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Solution

The fourth proportional to 28,412.32, 39,162 and 18,977.44 is: 26,157.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,412.32 : 39,162 = 18,977.44 : x
  2. Step 2: Convert to fraction form
    28,412.32/39,162 = 18,977.44/x
  3. Step 3: Cross multiply
    28,412.32x = 39,162 × 18,977.44
  4. Step 4: Simplify right side
    28,412.32x = 743,194,505.28
  5. Step 5: Solve for x
    x = 743,194,505.28/28,412.32
  6. Step 6: Final answer
    x = 26,157.47

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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.