Home / 30,944.56-42,696.40-20,891.68

Finding the Fourth Proportional to 30,944.56, 42,696.40 and 20,891.68

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Solution

The fourth proportional to 30,944.56, 42,696.40 and 20,891.68 is: 28,825.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,944.56 : 42,696.40 = 20,891.68 : x
  2. Step 2: Convert to fraction form
    30,944.56/42,696.40 = 20,891.68/x
  3. Step 3: Cross multiply
    30,944.56x = 42,696.40 × 20,891.68
  4. Step 4: Simplify right side
    30,944.56x = 891,999,525.95
  5. Step 5: Solve for x
    x = 891,999,525.95/30,944.56
  6. Step 6: Final answer
    x = 28,825.73

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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.