Home / 20,908.23-28,877.31-13,770.05

Finding the Fourth Proportional to 20,908.23, 28,877.31 and 13,770.05

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Solution

The fourth proportional to 20,908.23, 28,877.31 and 13,770.05 is: 19,018.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,908.23 : 28,877.31 = 13,770.05 : x
  2. Step 2: Convert to fraction form
    20,908.23/28,877.31 = 13,770.05/x
  3. Step 3: Cross multiply
    20,908.23x = 28,877.31 × 13,770.05
  4. Step 4: Simplify right side
    20,908.23x = 397,641,858.18
  5. Step 5: Solve for x
    x = 397,641,858.18/20,908.23
  6. Step 6: Final answer
    x = 19,018.44

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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.