Home / 27,678.14-38,193.18-15,740.84

Finding the Fourth Proportional to 27,678.14, 38,193.18 and 15,740.84

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Solution

The fourth proportional to 27,678.14, 38,193.18 and 15,740.84 is: 21,720.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,678.14 : 38,193.18 = 15,740.84 : x
  2. Step 2: Convert to fraction form
    27,678.14/38,193.18 = 15,740.84/x
  3. Step 3: Cross multiply
    27,678.14x = 38,193.18 × 15,740.84
  4. Step 4: Simplify right side
    27,678.14x = 601,192,735.47
  5. Step 5: Solve for x
    x = 601,192,735.47/27,678.14
  6. Step 6: Final answer
    x = 21,720.85

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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.