Home / 8,109.84-11,189-5,280.36

Finding the Fourth Proportional to 8,109.84, 11,189 and 5,280.36

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Solution

The fourth proportional to 8,109.84, 11,189 and 5,280.36 is: 7,285.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,109.84 : 11,189 = 5,280.36 : x
  2. Step 2: Convert to fraction form
    8,109.84/11,189 = 5,280.36/x
  3. Step 3: Cross multiply
    8,109.84x = 11,189 × 5,280.36
  4. Step 4: Simplify right side
    8,109.84x = 59,081,948.04
  5. Step 5: Solve for x
    x = 59,081,948.04/8,109.84
  6. Step 6: Final answer
    x = 7,285.22

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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.