Home / 19,888.62-27,440.68-12,819.13

Finding the Fourth Proportional to 19,888.62, 27,440.68 and 12,819.13

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Solution

The fourth proportional to 19,888.62, 27,440.68 and 12,819.13 is: 17,686.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,888.62 : 27,440.68 = 12,819.13 : x
  2. Step 2: Convert to fraction form
    19,888.62/27,440.68 = 12,819.13/x
  3. Step 3: Cross multiply
    19,888.62x = 27,440.68 × 12,819.13
  4. Step 4: Simplify right side
    19,888.62x = 351,765,644.21
  5. Step 5: Solve for x
    x = 351,765,644.21/19,888.62
  6. Step 6: Final answer
    x = 17,686.78

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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.