Home / 11,159.60-15,400.80-6,379.79

Finding the Fourth Proportional to 11,159.60, 15,400.80 and 6,379.79

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Solution

The fourth proportional to 11,159.60, 15,400.80 and 6,379.79 is: 8,804.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,159.60 : 15,400.80 = 6,379.79 : x
  2. Step 2: Convert to fraction form
    11,159.60/15,400.80 = 6,379.79/x
  3. Step 3: Cross multiply
    11,159.60x = 15,400.80 × 6,379.79
  4. Step 4: Simplify right side
    11,159.60x = 98,253,869.83
  5. Step 5: Solve for x
    x = 98,253,869.83/11,159.60
  6. Step 6: Final answer
    x = 8,804.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.