Home / 21,542.68-29,728.64-12,111.25

Finding the Fourth Proportional to 21,542.68, 29,728.64 and 12,111.25

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Solution

The fourth proportional to 21,542.68, 29,728.64 and 12,111.25 is: 16,713.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,542.68 : 29,728.64 = 12,111.25 : x
  2. Step 2: Convert to fraction form
    21,542.68/29,728.64 = 12,111.25/x
  3. Step 3: Cross multiply
    21,542.68x = 29,728.64 × 12,111.25
  4. Step 4: Simplify right side
    21,542.68x = 360,050,991.20
  5. Step 5: Solve for x
    x = 360,050,991.20/21,542.68
  6. Step 6: Final answer
    x = 16,713.38

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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.