Home / 21,330.36-29,436-11,899.32

Finding the Fourth Proportional to 21,330.36, 29,436 and 11,899.32

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Solution

The fourth proportional to 21,330.36, 29,436 and 11,899.32 is: 16,421.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,330.36 : 29,436 = 11,899.32 : x
  2. Step 2: Convert to fraction form
    21,330.36/29,436 = 11,899.32/x
  3. Step 3: Cross multiply
    21,330.36x = 29,436 × 11,899.32
  4. Step 4: Simplify right side
    21,330.36x = 350,268,383.52
  5. Step 5: Solve for x
    x = 350,268,383.52/21,330.36
  6. Step 6: Final answer
    x = 16,421.12

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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.