Home / 12,740.40-19,112.40-3,972.96

Finding the Fourth Proportional to 12,740.40, 19,112.40 and 3,972.96

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Solution

The fourth proportional to 12,740.40, 19,112.40 and 3,972.96 is: 5,960.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,740.40 : 19,112.40 = 3,972.96 : x
  2. Step 2: Convert to fraction form
    12,740.40/19,112.40 = 3,972.96/x
  3. Step 3: Cross multiply
    12,740.40x = 19,112.40 × 3,972.96
  4. Step 4: Simplify right side
    12,740.40x = 75,932,800.70
  5. Step 5: Solve for x
    x = 75,932,800.70/12,740.40
  6. Step 6: Final answer
    x = 5,960.00

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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.