Home / 13,611.80-20,384.76-6,930.76

Finding the Fourth Proportional to 13,611.80, 20,384.76 and 6,930.76

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Solution

The fourth proportional to 13,611.80, 20,384.76 and 6,930.76 is: 10,379.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,611.80 : 20,384.76 = 6,930.76 : x
  2. Step 2: Convert to fraction form
    13,611.80/20,384.76 = 6,930.76/x
  3. Step 3: Cross multiply
    13,611.80x = 20,384.76 × 6,930.76
  4. Step 4: Simplify right side
    13,611.80x = 141,281,879.22
  5. Step 5: Solve for x
    x = 141,281,879.22/13,611.80
  6. Step 6: Final answer
    x = 10,379.37

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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.