Home / 10,867.10-16,312.80-8,412.80

Finding the Fourth Proportional to 10,867.10, 16,312.80 and 8,412.80

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Solution

The fourth proportional to 10,867.10, 16,312.80 and 8,412.80 is: 12,628.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,867.10 : 16,312.80 = 8,412.80 : x
  2. Step 2: Convert to fraction form
    10,867.10/16,312.80 = 8,412.80/x
  3. Step 3: Cross multiply
    10,867.10x = 16,312.80 × 8,412.80
  4. Step 4: Simplify right side
    10,867.10x = 137,236,323.84
  5. Step 5: Solve for x
    x = 137,236,323.84/10,867.10
  6. Step 6: Final answer
    x = 12,628.61

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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.