Home / 13,609.52-20,331.60-8,639.36

Finding the Fourth Proportional to 13,609.52, 20,331.60 and 8,639.36

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Solution

The fourth proportional to 13,609.52, 20,331.60 and 8,639.36 is: 12,906.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,609.52 : 20,331.60 = 8,639.36 : x
  2. Step 2: Convert to fraction form
    13,609.52/20,331.60 = 8,639.36/x
  3. Step 3: Cross multiply
    13,609.52x = 20,331.60 × 8,639.36
  4. Step 4: Simplify right side
    13,609.52x = 175,652,011.78
  5. Step 5: Solve for x
    x = 175,652,011.78/13,609.52
  6. Step 6: Final answer
    x = 12,906.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.