Home / 13,860.21-19,121.67-8,545.80

Finding the Fourth Proportional to 13,860.21, 19,121.67 and 8,545.80

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Solution

The fourth proportional to 13,860.21, 19,121.67 and 8,545.80 is: 11,789.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,860.21 : 19,121.67 = 8,545.80 : x
  2. Step 2: Convert to fraction form
    13,860.21/19,121.67 = 8,545.80/x
  3. Step 3: Cross multiply
    13,860.21x = 19,121.67 × 8,545.80
  4. Step 4: Simplify right side
    13,860.21x = 163,409,967.49
  5. Step 5: Solve for x
    x = 163,409,967.49/13,860.21
  6. Step 6: Final answer
    x = 11,789.86

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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.