Home / 30,968.75-42,743.67-20,359.37

Finding the Fourth Proportional to 30,968.75, 42,743.67 and 20,359.37

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Solution

The fourth proportional to 30,968.75, 42,743.67 and 20,359.37 is: 28,100.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,968.75 : 42,743.67 = 20,359.37 : x
  2. Step 2: Convert to fraction form
    30,968.75/42,743.67 = 20,359.37/x
  3. Step 3: Cross multiply
    30,968.75x = 42,743.67 × 20,359.37
  4. Step 4: Simplify right side
    30,968.75x = 870,234,154.55
  5. Step 5: Solve for x
    x = 870,234,154.55/30,968.75
  6. Step 6: Final answer
    x = 28,100.40

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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.