Home / 13,106.20-19,659.30-12,587.80

Finding the Fourth Proportional to 13,106.20, 19,659.30 and 12,587.80

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Solution

The fourth proportional to 13,106.20, 19,659.30 and 12,587.80 is: 18,881.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,106.20 : 19,659.30 = 12,587.80 : x
  2. Step 2: Convert to fraction form
    13,106.20/19,659.30 = 12,587.80/x
  3. Step 3: Cross multiply
    13,106.20x = 19,659.30 × 12,587.80
  4. Step 4: Simplify right side
    13,106.20x = 247,467,336.54
  5. Step 5: Solve for x
    x = 247,467,336.54/13,106.20
  6. Step 6: Final answer
    x = 18,881.70

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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.