Home / 21,481.44-29,643.40-12,985.60

Finding the Fourth Proportional to 21,481.44, 29,643.40 and 12,985.60

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Solution

The fourth proportional to 21,481.44, 29,643.40 and 12,985.60 is: 17,919.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,481.44 : 29,643.40 = 12,985.60 : x
  2. Step 2: Convert to fraction form
    21,481.44/29,643.40 = 12,985.60/x
  3. Step 3: Cross multiply
    21,481.44x = 29,643.40 × 12,985.60
  4. Step 4: Simplify right side
    21,481.44x = 384,937,335.04
  5. Step 5: Solve for x
    x = 384,937,335.04/21,481.44
  6. Step 6: Final answer
    x = 17,919.53

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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.