Home / 21,640.26-29,862.90-12,687.60

Finding the Fourth Proportional to 21,640.26, 29,862.90 and 12,687.60

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Solution

The fourth proportional to 21,640.26, 29,862.90 and 12,687.60 is: 17,508.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,640.26 : 29,862.90 = 12,687.60 : x
  2. Step 2: Convert to fraction form
    21,640.26/29,862.90 = 12,687.60/x
  3. Step 3: Cross multiply
    21,640.26x = 29,862.90 × 12,687.60
  4. Step 4: Simplify right side
    21,640.26x = 378,888,530.04
  5. Step 5: Solve for x
    x = 378,888,530.04/21,640.26
  6. Step 6: Final answer
    x = 17,508.50

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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.