Home / 21,390.26-29,518.60-11,961.04

Finding the Fourth Proportional to 21,390.26, 29,518.60 and 11,961.04

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Solution

The fourth proportional to 21,390.26, 29,518.60 and 11,961.04 is: 16,506.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,390.26 : 29,518.60 = 11,961.04 : x
  2. Step 2: Convert to fraction form
    21,390.26/29,518.60 = 11,961.04/x
  3. Step 3: Cross multiply
    21,390.26x = 29,518.60 × 11,961.04
  4. Step 4: Simplify right side
    21,390.26x = 353,073,155.34
  5. Step 5: Solve for x
    x = 353,073,155.34/21,390.26
  6. Step 6: Final answer
    x = 16,506.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.