Home / 8,105.28-12,159.96-2,558.40

Finding the Fourth Proportional to 8,105.28, 12,159.96 and 2,558.40

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Solution

The fourth proportional to 8,105.28, 12,159.96 and 2,558.40 is: 3,838.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,105.28 : 12,159.96 = 2,558.40 : x
  2. Step 2: Convert to fraction form
    8,105.28/12,159.96 = 2,558.40/x
  3. Step 3: Cross multiply
    8,105.28x = 12,159.96 × 2,558.40
  4. Step 4: Simplify right side
    8,105.28x = 31,110,041.66
  5. Step 5: Solve for x
    x = 31,110,041.66/8,105.28
  6. Step 6: Final answer
    x = 3,838.24

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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.