Home / 21,911.05-30,235.49-12,958.93

Finding the Fourth Proportional to 21,911.05, 30,235.49 and 12,958.93

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Solution

The fourth proportional to 21,911.05, 30,235.49 and 12,958.93 is: 17,882.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,911.05 : 30,235.49 = 12,958.93 : x
  2. Step 2: Convert to fraction form
    21,911.05/30,235.49 = 12,958.93/x
  3. Step 3: Cross multiply
    21,911.05x = 30,235.49 × 12,958.93
  4. Step 4: Simplify right side
    21,911.05x = 391,819,447.25
  5. Step 5: Solve for x
    x = 391,819,447.25/21,911.05
  6. Step 6: Final answer
    x = 17,882.28

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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.