Home / 21,172.86-29,218.77-11,742.03

Finding the Fourth Proportional to 21,172.86, 29,218.77 and 11,742.03

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Solution

The fourth proportional to 21,172.86, 29,218.77 and 11,742.03 is: 16,204.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,172.86 : 29,218.77 = 11,742.03 : x
  2. Step 2: Convert to fraction form
    21,172.86/29,218.77 = 11,742.03/x
  3. Step 3: Cross multiply
    21,172.86x = 29,218.77 × 11,742.03
  4. Step 4: Simplify right side
    21,172.86x = 343,087,673.90
  5. Step 5: Solve for x
    x = 343,087,673.90/21,172.86
  6. Step 6: Final answer
    x = 16,204.13

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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.