Home / 19,621.12-29,436.80-11,879.68

Finding the Fourth Proportional to 19,621.12, 29,436.80 and 11,879.68

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Solution

The fourth proportional to 19,621.12, 29,436.80 and 11,879.68 is: 17,822.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,621.12 : 29,436.80 = 11,879.68 : x
  2. Step 2: Convert to fraction form
    19,621.12/29,436.80 = 11,879.68/x
  3. Step 3: Cross multiply
    19,621.12x = 29,436.80 × 11,879.68
  4. Step 4: Simplify right side
    19,621.12x = 349,699,764.22
  5. Step 5: Solve for x
    x = 349,699,764.22/19,621.12
  6. Step 6: Final answer
    x = 17,822.62

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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.