Home / 21,221.52-29,286.08-11,662.40

Finding the Fourth Proportional to 21,221.52, 29,286.08 and 11,662.40

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Solution

The fourth proportional to 21,221.52, 29,286.08 and 11,662.40 is: 16,094.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,221.52 : 29,286.08 = 11,662.40 : x
  2. Step 2: Convert to fraction form
    21,221.52/29,286.08 = 11,662.40/x
  3. Step 3: Cross multiply
    21,221.52x = 29,286.08 × 11,662.40
  4. Step 4: Simplify right side
    21,221.52x = 341,545,979.39
  5. Step 5: Solve for x
    x = 341,545,979.39/21,221.52
  6. Step 6: Final answer
    x = 16,094.32

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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.