Home / 11,279.20-16,918.80-4,705.60

Finding the Fourth Proportional to 11,279.20, 16,918.80 and 4,705.60

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Solution

The fourth proportional to 11,279.20, 16,918.80 and 4,705.60 is: 7,058.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,279.20 : 16,918.80 = 4,705.60 : x
  2. Step 2: Convert to fraction form
    11,279.20/16,918.80 = 4,705.60/x
  3. Step 3: Cross multiply
    11,279.20x = 16,918.80 × 4,705.60
  4. Step 4: Simplify right side
    11,279.20x = 79,613,105.28
  5. Step 5: Solve for x
    x = 79,613,105.28/11,279.20
  6. Step 6: Final answer
    x = 7,058.40

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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.