Home / 12,300.80-18,451.20-11,225.60

Finding the Fourth Proportional to 12,300.80, 18,451.20 and 11,225.60

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Solution

The fourth proportional to 12,300.80, 18,451.20 and 11,225.60 is: 16,838.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,300.80 : 18,451.20 = 11,225.60 : x
  2. Step 2: Convert to fraction form
    12,300.80/18,451.20 = 11,225.60/x
  3. Step 3: Cross multiply
    12,300.80x = 18,451.20 × 11,225.60
  4. Step 4: Simplify right side
    12,300.80x = 207,125,790.72
  5. Step 5: Solve for x
    x = 207,125,790.72/12,300.80
  6. Step 6: Final answer
    x = 16,838.40

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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.