Home / 27,822.78-38,394.86-19,878.50

Finding the Fourth Proportional to 27,822.78, 38,394.86 and 19,878.50

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Solution

The fourth proportional to 27,822.78, 38,394.86 and 19,878.50 is: 27,431.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,822.78 : 38,394.86 = 19,878.50 : x
  2. Step 2: Convert to fraction form
    27,822.78/38,394.86 = 19,878.50/x
  3. Step 3: Cross multiply
    27,822.78x = 38,394.86 × 19,878.50
  4. Step 4: Simplify right side
    27,822.78x = 763,231,933.14
  5. Step 5: Solve for x
    x = 763,231,933.14/27,822.78
  6. Step 6: Final answer
    x = 27,431.91

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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.