Home / 21,511.20-29,687.46-13,015.41

Finding the Fourth Proportional to 21,511.20, 29,687.46 and 13,015.41

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Solution

The fourth proportional to 21,511.20, 29,687.46 and 13,015.41 is: 17,962.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,511.20 : 29,687.46 = 13,015.41 : x
  2. Step 2: Convert to fraction form
    21,511.20/29,687.46 = 13,015.41/x
  3. Step 3: Cross multiply
    21,511.20x = 29,687.46 × 13,015.41
  4. Step 4: Simplify right side
    21,511.20x = 386,394,315.32
  5. Step 5: Solve for x
    x = 386,394,315.32/21,511.20
  6. Step 6: Final answer
    x = 17,962.48

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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.