Home / 18,838.20-28,110.39-18,708.60

Finding the Fourth Proportional to 18,838.20, 28,110.39 and 18,708.60

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Solution

The fourth proportional to 18,838.20, 28,110.39 and 18,708.60 is: 27,917.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,838.20 : 28,110.39 = 18,708.60 : x
  2. Step 2: Convert to fraction form
    18,838.20/28,110.39 = 18,708.60/x
  3. Step 3: Cross multiply
    18,838.20x = 28,110.39 × 18,708.60
  4. Step 4: Simplify right side
    18,838.20x = 525,906,042.35
  5. Step 5: Solve for x
    x = 525,906,042.35/18,838.20
  6. Step 6: Final answer
    x = 27,917.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.