Home / 21,748.25-29,787.70-20,471.60

Finding the Fourth Proportional to 21,748.25, 29,787.70 and 20,471.60

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Solution

The fourth proportional to 21,748.25, 29,787.70 and 20,471.60 is: 28,039.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,748.25 : 29,787.70 = 20,471.60 : x
  2. Step 2: Convert to fraction form
    21,748.25/29,787.70 = 20,471.60/x
  3. Step 3: Cross multiply
    21,748.25x = 29,787.70 × 20,471.60
  4. Step 4: Simplify right side
    21,748.25x = 609,801,879.32
  5. Step 5: Solve for x
    x = 609,801,879.32/21,748.25
  6. Step 6: Final answer
    x = 28,039.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.