Home / 13,628.94-20,439.06-4,392.78

Finding the Fourth Proportional to 13,628.94, 20,439.06 and 4,392.78

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Solution

The fourth proportional to 13,628.94, 20,439.06 and 4,392.78 is: 6,587.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,628.94 : 20,439.06 = 4,392.78 : x
  2. Step 2: Convert to fraction form
    13,628.94/20,439.06 = 4,392.78/x
  3. Step 3: Cross multiply
    13,628.94x = 20,439.06 × 4,392.78
  4. Step 4: Simplify right side
    13,628.94x = 89,784,293.99
  5. Step 5: Solve for x
    x = 89,784,293.99/13,628.94
  6. Step 6: Final answer
    x = 6,587.77

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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.