Home / 28,761.56-43,138.64-21,376.78

Finding the Fourth Proportional to 28,761.56, 43,138.64 and 21,376.78

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Solution

The fourth proportional to 28,761.56, 43,138.64 and 21,376.78 is: 32,062.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,761.56 : 43,138.64 = 21,376.78 : x
  2. Step 2: Convert to fraction form
    28,761.56/43,138.64 = 21,376.78/x
  3. Step 3: Cross multiply
    28,761.56x = 43,138.64 × 21,376.78
  4. Step 4: Simplify right side
    28,761.56x = 922,165,216.78
  5. Step 5: Solve for x
    x = 922,165,216.78/28,761.56
  6. Step 6: Final answer
    x = 32,062.42

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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.