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Finding the Fourth Proportional to 11,420.65, 17,128.95 and 3,101.32

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Solution

The fourth proportional to 11,420.65, 17,128.95 and 3,101.32 is: 4,651.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,420.65 : 17,128.95 = 3,101.32 : x
  2. Step 2: Convert to fraction form
    11,420.65/17,128.95 = 3,101.32/x
  3. Step 3: Cross multiply
    11,420.65x = 17,128.95 × 3,101.32
  4. Step 4: Simplify right side
    11,420.65x = 53,122,355.21
  5. Step 5: Solve for x
    x = 53,122,355.21/11,420.65
  6. Step 6: Final answer
    x = 4,651.43

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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.