Home / 20,211.90-30,307.05-8,511.90

Finding the Fourth Proportional to 20,211.90, 30,307.05 and 8,511.90

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Solution

The fourth proportional to 20,211.90, 30,307.05 and 8,511.90 is: 12,763.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,211.90 : 30,307.05 = 8,511.90 : x
  2. Step 2: Convert to fraction form
    20,211.90/30,307.05 = 8,511.90/x
  3. Step 3: Cross multiply
    20,211.90x = 30,307.05 × 8,511.90
  4. Step 4: Simplify right side
    20,211.90x = 257,970,578.90
  5. Step 5: Solve for x
    x = 257,970,578.90/20,211.90
  6. Step 6: Final answer
    x = 12,763.30

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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.