Home / 13,140.45-19,729.13-12,545.33

Finding the Fourth Proportional to 13,140.45, 19,729.13 and 12,545.33

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Solution

The fourth proportional to 13,140.45, 19,729.13 and 12,545.33 is: 18,835.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.45 : 19,729.13 = 12,545.33 : x
  2. Step 2: Convert to fraction form
    13,140.45/19,729.13 = 12,545.33/x
  3. Step 3: Cross multiply
    13,140.45x = 19,729.13 × 12,545.33
  4. Step 4: Simplify right side
    13,140.45x = 247,508,285.09
  5. Step 5: Solve for x
    x = 247,508,285.09/13,140.45
  6. Step 6: Final answer
    x = 18,835.60

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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.