Home / 8,005.32-12,009.80-2,811.20

Finding the Fourth Proportional to 8,005.32, 12,009.80 and 2,811.20

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Solution

The fourth proportional to 8,005.32, 12,009.80 and 2,811.20 is: 4,217.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,005.32 : 12,009.80 = 2,811.20 : x
  2. Step 2: Convert to fraction form
    8,005.32/12,009.80 = 2,811.20/x
  3. Step 3: Cross multiply
    8,005.32x = 12,009.80 × 2,811.20
  4. Step 4: Simplify right side
    8,005.32x = 33,761,875.66
  5. Step 5: Solve for x
    x = 33,761,875.66/8,005.32
  6. Step 6: Final answer
    x = 4,217.43

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1.5x scale

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.