Home / 21,219.08-31,817.42-7,174.28

Finding the Fourth Proportional to 21,219.08, 31,817.42 and 7,174.28

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Solution

The fourth proportional to 21,219.08, 31,817.42 and 7,174.28 is: 10,757.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,219.08 : 31,817.42 = 7,174.28 : x
  2. Step 2: Convert to fraction form
    21,219.08/31,817.42 = 7,174.28/x
  3. Step 3: Cross multiply
    21,219.08x = 31,817.42 × 7,174.28
  4. Step 4: Simplify right side
    21,219.08x = 228,267,079.96
  5. Step 5: Solve for x
    x = 228,267,079.96/21,219.08
  6. Step 6: Final answer
    x = 10,757.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.