Home / 27,615.49-38,109.42-15,678.83

Finding the Fourth Proportional to 27,615.49, 38,109.42 and 15,678.83

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Solution

The fourth proportional to 27,615.49, 38,109.42 and 15,678.83 is: 21,636.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,615.49 : 38,109.42 = 15,678.83 : x
  2. Step 2: Convert to fraction form
    27,615.49/38,109.42 = 15,678.83/x
  3. Step 3: Cross multiply
    27,615.49x = 38,109.42 × 15,678.83
  4. Step 4: Simplify right side
    27,615.49x = 597,511,117.58
  5. Step 5: Solve for x
    x = 597,511,117.58/27,615.49
  6. Step 6: Final answer
    x = 21,636.81

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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.