Home / 18,078.15-27,013.58-13,780.09

Finding the Fourth Proportional to 18,078.15, 27,013.58 and 13,780.09

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Solution

The fourth proportional to 18,078.15, 27,013.58 and 13,780.09 is: 20,591.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,078.15 : 27,013.58 = 13,780.09 : x
  2. Step 2: Convert to fraction form
    18,078.15/27,013.58 = 13,780.09/x
  3. Step 3: Cross multiply
    18,078.15x = 27,013.58 × 13,780.09
  4. Step 4: Simplify right side
    18,078.15x = 372,249,563.62
  5. Step 5: Solve for x
    x = 372,249,563.62/18,078.15
  6. Step 6: Final answer
    x = 20,591.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.