Home / 20,754.05-31,120.26-7,421.91

Finding the Fourth Proportional to 20,754.05, 31,120.26 and 7,421.91

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Solution

The fourth proportional to 20,754.05, 31,120.26 and 7,421.91 is: 11,129.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,754.05 : 31,120.26 = 7,421.91 : x
  2. Step 2: Convert to fraction form
    20,754.05/31,120.26 = 7,421.91/x
  3. Step 3: Cross multiply
    20,754.05x = 31,120.26 × 7,421.91
  4. Step 4: Simplify right side
    20,754.05x = 230,971,768.90
  5. Step 5: Solve for x
    x = 230,971,768.90/20,754.05
  6. Step 6: Final answer
    x = 11,129.00

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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.