Home / 8,989.92-12,405.80-5,634.54

Finding the Fourth Proportional to 8,989.92, 12,405.80 and 5,634.54

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Solution

The fourth proportional to 8,989.92, 12,405.80 and 5,634.54 is: 7,775.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,989.92 : 12,405.80 = 5,634.54 : x
  2. Step 2: Convert to fraction form
    8,989.92/12,405.80 = 5,634.54/x
  3. Step 3: Cross multiply
    8,989.92x = 12,405.80 × 5,634.54
  4. Step 4: Simplify right side
    8,989.92x = 69,901,018.62
  5. Step 5: Solve for x
    x = 69,901,018.62/8,989.92
  6. Step 6: Final answer
    x = 7,775.49

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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.