Home / 20,857.55-31,100.27-18,539.33

Finding the Fourth Proportional to 20,857.55, 31,100.27 and 18,539.33

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Solution

The fourth proportional to 20,857.55, 31,100.27 and 18,539.33 is: 27,643.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,857.55 : 31,100.27 = 18,539.33 : x
  2. Step 2: Convert to fraction form
    20,857.55/31,100.27 = 18,539.33/x
  3. Step 3: Cross multiply
    20,857.55x = 31,100.27 × 18,539.33
  4. Step 4: Simplify right side
    20,857.55x = 576,578,137.22
  5. Step 5: Solve for x
    x = 576,578,137.22/20,857.55
  6. Step 6: Final answer
    x = 27,643.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.