Home / 21,910.39-30,242.54-12,961.01

Finding the Fourth Proportional to 21,910.39, 30,242.54 and 12,961.01

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Solution

The fourth proportional to 21,910.39, 30,242.54 and 12,961.01 is: 17,889.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,910.39 : 30,242.54 = 12,961.01 : x
  2. Step 2: Convert to fraction form
    21,910.39/30,242.54 = 12,961.01/x
  3. Step 3: Cross multiply
    21,910.39x = 30,242.54 × 12,961.01
  4. Step 4: Simplify right side
    21,910.39x = 391,973,722.95
  5. Step 5: Solve for x
    x = 391,973,722.95/21,910.39
  6. Step 6: Final answer
    x = 17,889.85

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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.