Home / 8,118.80-12,172.08-3,187.76

Finding the Fourth Proportional to 8,118.80, 12,172.08 and 3,187.76

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Solution

The fourth proportional to 8,118.80, 12,172.08 and 3,187.76 is: 4,779.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,118.80 : 12,172.08 = 3,187.76 : x
  2. Step 2: Convert to fraction form
    8,118.80/12,172.08 = 3,187.76/x
  3. Step 3: Cross multiply
    8,118.80x = 12,172.08 × 3,187.76
  4. Step 4: Simplify right side
    8,118.80x = 38,801,669.74
  5. Step 5: Solve for x
    x = 38,801,669.74/8,118.80
  6. Step 6: Final answer
    x = 4,779.24

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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.