Home / 20,910.03-31,371.21-8,423.64

Finding the Fourth Proportional to 20,910.03, 31,371.21 and 8,423.64

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Solution

The fourth proportional to 20,910.03, 31,371.21 and 8,423.64 is: 12,637.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,910.03 : 31,371.21 = 8,423.64 : x
  2. Step 2: Convert to fraction form
    20,910.03/31,371.21 = 8,423.64/x
  3. Step 3: Cross multiply
    20,910.03x = 31,371.21 × 8,423.64
  4. Step 4: Simplify right side
    20,910.03x = 264,259,779.40
  5. Step 5: Solve for x
    x = 264,259,779.40/20,910.03
  6. Step 6: Final answer
    x = 12,637.94

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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.