Home / 13,545.21-20,286.23-13,171.45

Finding the Fourth Proportional to 13,545.21, 20,286.23 and 13,171.45

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Solution

The fourth proportional to 13,545.21, 20,286.23 and 13,171.45 is: 19,726.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,545.21 : 20,286.23 = 13,171.45 : x
  2. Step 2: Convert to fraction form
    13,545.21/20,286.23 = 13,171.45/x
  3. Step 3: Cross multiply
    13,545.21x = 20,286.23 × 13,171.45
  4. Step 4: Simplify right side
    13,545.21x = 267,199,064.13
  5. Step 5: Solve for x
    x = 267,199,064.13/13,545.21
  6. Step 6: Final answer
    x = 19,726.46

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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.