Home / 12,891.15-19,336.32-4,125.87

Finding the Fourth Proportional to 12,891.15, 19,336.32 and 4,125.87

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Solution

The fourth proportional to 12,891.15, 19,336.32 and 4,125.87 is: 6,188.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,891.15 : 19,336.32 = 4,125.87 : x
  2. Step 2: Convert to fraction form
    12,891.15/19,336.32 = 4,125.87/x
  3. Step 3: Cross multiply
    12,891.15x = 19,336.32 × 4,125.87
  4. Step 4: Simplify right side
    12,891.15x = 79,779,142.60
  5. Step 5: Solve for x
    x = 79,779,142.60/12,891.15
  6. Step 6: Final answer
    x = 6,188.68

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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.