Home / 11,128.80-16,693.20-10,221.60

Finding the Fourth Proportional to 11,128.80, 16,693.20 and 10,221.60

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Solution

The fourth proportional to 11,128.80, 16,693.20 and 10,221.60 is: 15,332.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,128.80 : 16,693.20 = 10,221.60 : x
  2. Step 2: Convert to fraction form
    11,128.80/16,693.20 = 10,221.60/x
  3. Step 3: Cross multiply
    11,128.80x = 16,693.20 × 10,221.60
  4. Step 4: Simplify right side
    11,128.80x = 170,631,213.12
  5. Step 5: Solve for x
    x = 170,631,213.12/11,128.80
  6. Step 6: Final answer
    x = 15,332.40

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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.