Home / 13,612.36-20,429.72-7,040.56

Finding the Fourth Proportional to 13,612.36, 20,429.72 and 7,040.56

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Solution

The fourth proportional to 13,612.36, 20,429.72 and 7,040.56 is: 10,566.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,612.36 : 20,429.72 = 7,040.56 : x
  2. Step 2: Convert to fraction form
    13,612.36/20,429.72 = 7,040.56/x
  3. Step 3: Cross multiply
    13,612.36x = 20,429.72 × 7,040.56
  4. Step 4: Simplify right side
    13,612.36x = 143,836,669.44
  5. Step 5: Solve for x
    x = 143,836,669.44/13,612.36
  6. Step 6: Final answer
    x = 10,566.62

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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.