Home / 11,220.67-16,830.40-3,428.88

Finding the Fourth Proportional to 11,220.67, 16,830.40 and 3,428.88

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Solution

The fourth proportional to 11,220.67, 16,830.40 and 3,428.88 is: 5,143.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,220.67 : 16,830.40 = 3,428.88 : x
  2. Step 2: Convert to fraction form
    11,220.67/16,830.40 = 3,428.88/x
  3. Step 3: Cross multiply
    11,220.67x = 16,830.40 × 3,428.88
  4. Step 4: Simplify right side
    11,220.67x = 57,709,421.95
  5. Step 5: Solve for x
    x = 57,709,421.95/11,220.67
  6. Step 6: Final answer
    x = 5,143.14

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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.