Home / 12,813.48-19,128.62-11,899.80

Finding the Fourth Proportional to 12,813.48, 19,128.62 and 11,899.80

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Solution

The fourth proportional to 12,813.48, 19,128.62 and 11,899.80 is: 17,764.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,813.48 : 19,128.62 = 11,899.80 : x
  2. Step 2: Convert to fraction form
    12,813.48/19,128.62 = 11,899.80/x
  3. Step 3: Cross multiply
    12,813.48x = 19,128.62 × 11,899.80
  4. Step 4: Simplify right side
    12,813.48x = 227,626,692.78
  5. Step 5: Solve for x
    x = 227,626,692.78/12,813.48
  6. Step 6: Final answer
    x = 17,764.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.