Home / 12,837.20-19,255.80-11,109.20

Finding the Fourth Proportional to 12,837.20, 19,255.80 and 11,109.20

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Solution

The fourth proportional to 12,837.20, 19,255.80 and 11,109.20 is: 16,663.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,837.20 : 19,255.80 = 11,109.20 : x
  2. Step 2: Convert to fraction form
    12,837.20/19,255.80 = 11,109.20/x
  3. Step 3: Cross multiply
    12,837.20x = 19,255.80 × 11,109.20
  4. Step 4: Simplify right side
    12,837.20x = 213,916,533.36
  5. Step 5: Solve for x
    x = 213,916,533.36/12,837.20
  6. Step 6: Final answer
    x = 16,663.80

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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.