Home / 19,874.10-27,428.85-12,821.04

Finding the Fourth Proportional to 19,874.10, 27,428.85 and 12,821.04

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Solution

The fourth proportional to 19,874.10, 27,428.85 and 12,821.04 is: 17,694.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,874.10 : 27,428.85 = 12,821.04 : x
  2. Step 2: Convert to fraction form
    19,874.10/27,428.85 = 12,821.04/x
  3. Step 3: Cross multiply
    19,874.10x = 27,428.85 × 12,821.04
  4. Step 4: Simplify right side
    19,874.10x = 351,666,383.00
  5. Step 5: Solve for x
    x = 351,666,383.00/19,874.10
  6. Step 6: Final answer
    x = 17,694.71

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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.