Home / 12,960.72-19,436.88-4,193.76

Finding the Fourth Proportional to 12,960.72, 19,436.88 and 4,193.76

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Solution

The fourth proportional to 12,960.72, 19,436.88 and 4,193.76 is: 6,289.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,960.72 : 19,436.88 = 4,193.76 : x
  2. Step 2: Convert to fraction form
    12,960.72/19,436.88 = 4,193.76/x
  3. Step 3: Cross multiply
    12,960.72x = 19,436.88 × 4,193.76
  4. Step 4: Simplify right side
    12,960.72x = 81,513,609.87
  5. Step 5: Solve for x
    x = 81,513,609.87/12,960.72
  6. Step 6: Final answer
    x = 6,289.28

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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.