Home / 20,219.40-30,296.70-13,285.80

Finding the Fourth Proportional to 20,219.40, 30,296.70 and 13,285.80

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Solution

The fourth proportional to 20,219.40, 30,296.70 and 13,285.80 is: 19,907.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,219.40 : 30,296.70 = 13,285.80 : x
  2. Step 2: Convert to fraction form
    20,219.40/30,296.70 = 13,285.80/x
  3. Step 3: Cross multiply
    20,219.40x = 30,296.70 × 13,285.80
  4. Step 4: Simplify right side
    20,219.40x = 402,515,896.86
  5. Step 5: Solve for x
    x = 402,515,896.86/20,219.40
  6. Step 6: Final answer
    x = 19,907.41

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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.