Home / 11,720.80-17,582.08-3,929.60

Finding the Fourth Proportional to 11,720.80, 17,582.08 and 3,929.60

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Solution

The fourth proportional to 11,720.80, 17,582.08 and 3,929.60 is: 5,894.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,720.80 : 17,582.08 = 3,929.60 : x
  2. Step 2: Convert to fraction form
    11,720.80/17,582.08 = 3,929.60/x
  3. Step 3: Cross multiply
    11,720.80x = 17,582.08 × 3,929.60
  4. Step 4: Simplify right side
    11,720.80x = 69,090,541.57
  5. Step 5: Solve for x
    x = 69,090,541.57/11,720.80
  6. Step 6: Final answer
    x = 5,894.70

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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.