Home / 21,021.62-29,013.66-13,471.20

Finding the Fourth Proportional to 21,021.62, 29,013.66 and 13,471.20

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Solution

The fourth proportional to 21,021.62, 29,013.66 and 13,471.20 is: 18,592.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,021.62 : 29,013.66 = 13,471.20 : x
  2. Step 2: Convert to fraction form
    21,021.62/29,013.66 = 13,471.20/x
  3. Step 3: Cross multiply
    21,021.62x = 29,013.66 × 13,471.20
  4. Step 4: Simplify right side
    21,021.62x = 390,848,816.59
  5. Step 5: Solve for x
    x = 390,848,816.59/21,021.62
  6. Step 6: Final answer
    x = 18,592.71

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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.