Home / 21,828.49-30,115.41-14,279.12

Finding the Fourth Proportional to 21,828.49, 30,115.41 and 14,279.12

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Solution

The fourth proportional to 21,828.49, 30,115.41 and 14,279.12 is: 19,700.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,828.49 : 30,115.41 = 14,279.12 : x
  2. Step 2: Convert to fraction form
    21,828.49/30,115.41 = 14,279.12/x
  3. Step 3: Cross multiply
    21,828.49x = 30,115.41 × 14,279.12
  4. Step 4: Simplify right side
    21,828.49x = 430,021,553.24
  5. Step 5: Solve for x
    x = 430,021,553.24/21,828.49
  6. Step 6: Final answer
    x = 19,700.01

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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.