Home / 10,920.49-16,390.46-5,080.39

Finding the Fourth Proportional to 10,920.49, 16,390.46 and 5,080.39

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Solution

The fourth proportional to 10,920.49, 16,390.46 and 5,080.39 is: 7,625.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,920.49 : 16,390.46 = 5,080.39 : x
  2. Step 2: Convert to fraction form
    10,920.49/16,390.46 = 5,080.39/x
  3. Step 3: Cross multiply
    10,920.49x = 16,390.46 × 5,080.39
  4. Step 4: Simplify right side
    10,920.49x = 83,269,929.08
  5. Step 5: Solve for x
    x = 83,269,929.08/10,920.49
  6. Step 6: Final answer
    x = 7,625.11

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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.