Home / 8,389.80-11,581.44-5,664.84

Finding the Fourth Proportional to 8,389.80, 11,581.44 and 5,664.84

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Solution

The fourth proportional to 8,389.80, 11,581.44 and 5,664.84 is: 7,819.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,389.80 : 11,581.44 = 5,664.84 : x
  2. Step 2: Convert to fraction form
    8,389.80/11,581.44 = 5,664.84/x
  3. Step 3: Cross multiply
    8,389.80x = 11,581.44 × 5,664.84
  4. Step 4: Simplify right side
    8,389.80x = 65,607,004.57
  5. Step 5: Solve for x
    x = 65,607,004.57/8,389.80
  6. Step 6: Final answer
    x = 7,819.85

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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.