Home / 12,106.60-18,203.10-10,205.80

Finding the Fourth Proportional to 12,106.60, 18,203.10 and 10,205.80

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Solution

The fourth proportional to 12,106.60, 18,203.10 and 10,205.80 is: 15,345.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,106.60 : 18,203.10 = 10,205.80 : x
  2. Step 2: Convert to fraction form
    12,106.60/18,203.10 = 10,205.80/x
  3. Step 3: Cross multiply
    12,106.60x = 18,203.10 × 10,205.80
  4. Step 4: Simplify right side
    12,106.60x = 185,777,197.98
  5. Step 5: Solve for x
    x = 185,777,197.98/12,106.60
  6. Step 6: Final answer
    x = 15,345.12

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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.