Home / 20,867.67-31,115.39-18,549.45

Finding the Fourth Proportional to 20,867.67, 31,115.39 and 18,549.45

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Solution

The fourth proportional to 20,867.67, 31,115.39 and 18,549.45 is: 27,658.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,867.67 : 31,115.39 = 18,549.45 : x
  2. Step 2: Convert to fraction form
    20,867.67/31,115.39 = 18,549.45/x
  3. Step 3: Cross multiply
    20,867.67x = 31,115.39 × 18,549.45
  4. Step 4: Simplify right side
    20,867.67x = 577,173,371.04
  5. Step 5: Solve for x
    x = 577,173,371.04/20,867.67
  6. Step 6: Final answer
    x = 27,658.74

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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.