Home / 18,665.08-27,987.90-5,515.68

Finding the Fourth Proportional to 18,665.08, 27,987.90 and 5,515.68

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Solution

The fourth proportional to 18,665.08, 27,987.90 and 5,515.68 is: 8,270.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,665.08 : 27,987.90 = 5,515.68 : x
  2. Step 2: Convert to fraction form
    18,665.08/27,987.90 = 5,515.68/x
  3. Step 3: Cross multiply
    18,665.08x = 27,987.90 × 5,515.68
  4. Step 4: Simplify right side
    18,665.08x = 154,372,160.33
  5. Step 5: Solve for x
    x = 154,372,160.33/18,665.08
  6. Step 6: Final answer
    x = 8,270.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.