Home / 20,712.03-31,070.67-20,391.45

Finding the Fourth Proportional to 20,712.03, 31,070.67 and 20,391.45

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Solution

The fourth proportional to 20,712.03, 31,070.67 and 20,391.45 is: 30,589.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712.03 : 31,070.67 = 20,391.45 : x
  2. Step 2: Convert to fraction form
    20,712.03/31,070.67 = 20,391.45/x
  3. Step 3: Cross multiply
    20,712.03x = 31,070.67 × 20,391.45
  4. Step 4: Simplify right side
    20,712.03x = 633,576,013.77
  5. Step 5: Solve for x
    x = 633,576,013.77/20,712.03
  6. Step 6: Final answer
    x = 30,589.76

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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.