Home / 21,074.57-29,080.28-13,119.36

Finding the Fourth Proportional to 21,074.57, 29,080.28 and 13,119.36

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Solution

The fourth proportional to 21,074.57, 29,080.28 and 13,119.36 is: 18,103.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,074.57 : 29,080.28 = 13,119.36 : x
  2. Step 2: Convert to fraction form
    21,074.57/29,080.28 = 13,119.36/x
  3. Step 3: Cross multiply
    21,074.57x = 29,080.28 × 13,119.36
  4. Step 4: Simplify right side
    21,074.57x = 381,514,662.22
  5. Step 5: Solve for x
    x = 381,514,662.22/21,074.57
  6. Step 6: Final answer
    x = 18,103.08

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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.