Home / 30,968.37-42,729.03-18,222.11

Finding the Fourth Proportional to 30,968.37, 42,729.03 and 18,222.11

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Solution

The fourth proportional to 30,968.37, 42,729.03 and 18,222.11 is: 25,142.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,968.37 : 42,729.03 = 18,222.11 : x
  2. Step 2: Convert to fraction form
    30,968.37/42,729.03 = 18,222.11/x
  3. Step 3: Cross multiply
    30,968.37x = 42,729.03 × 18,222.11
  4. Step 4: Simplify right side
    30,968.37x = 778,612,871.21
  5. Step 5: Solve for x
    x = 778,612,871.21/30,968.37
  6. Step 6: Final answer
    x = 25,142.20

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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.