Home / 13,836.40-20,722.20-8,587.60

Finding the Fourth Proportional to 13,836.40, 20,722.20 and 8,587.60

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Solution

The fourth proportional to 13,836.40, 20,722.20 and 8,587.60 is: 12,861.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,836.40 : 20,722.20 = 8,587.60 : x
  2. Step 2: Convert to fraction form
    13,836.40/20,722.20 = 8,587.60/x
  3. Step 3: Cross multiply
    13,836.40x = 20,722.20 × 8,587.60
  4. Step 4: Simplify right side
    13,836.40x = 177,953,964.72
  5. Step 5: Solve for x
    x = 177,953,964.72/13,836.40
  6. Step 6: Final answer
    x = 12,861.29

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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.