Home / 12,487.15-18,728.70-4,166.83

Finding the Fourth Proportional to 12,487.15, 18,728.70 and 4,166.83

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Solution

The fourth proportional to 12,487.15, 18,728.70 and 4,166.83 is: 6,249.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,487.15 : 18,728.70 = 4,166.83 : x
  2. Step 2: Convert to fraction form
    12,487.15/18,728.70 = 4,166.83/x
  3. Step 3: Cross multiply
    12,487.15x = 18,728.70 × 4,166.83
  4. Step 4: Simplify right side
    12,487.15x = 78,039,309.02
  5. Step 5: Solve for x
    x = 78,039,309.02/12,487.15
  6. Step 6: Final answer
    x = 6,249.57

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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.