Home / 30,991.21-42,768.20-16,844.06

Finding the Fourth Proportional to 30,991.21, 42,768.20 and 16,844.06

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Solution

The fourth proportional to 30,991.21, 42,768.20 and 16,844.06 is: 23,244.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,991.21 : 42,768.20 = 16,844.06 : x
  2. Step 2: Convert to fraction form
    30,991.21/42,768.20 = 16,844.06/x
  3. Step 3: Cross multiply
    30,991.21x = 42,768.20 × 16,844.06
  4. Step 4: Simplify right side
    30,991.21x = 720,390,126.89
  5. Step 5: Solve for x
    x = 720,390,126.89/30,991.21
  6. Step 6: Final answer
    x = 23,244.98

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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.