Home / 20,638.90-30,955.72-6,600.39

Finding the Fourth Proportional to 20,638.90, 30,955.72 and 6,600.39

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Solution

The fourth proportional to 20,638.90, 30,955.72 and 6,600.39 is: 9,899.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638.90 : 30,955.72 = 6,600.39 : x
  2. Step 2: Convert to fraction form
    20,638.90/30,955.72 = 6,600.39/x
  3. Step 3: Cross multiply
    20,638.90x = 30,955.72 × 6,600.39
  4. Step 4: Simplify right side
    20,638.90x = 204,319,704.52
  5. Step 5: Solve for x
    x = 204,319,704.52/20,638.90
  6. Step 6: Final answer
    x = 9,899.74

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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.