Home / 18,712.49-28,109.70-13,813.61

Finding the Fourth Proportional to 18,712.49, 28,109.70 and 13,813.61

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Solution

The fourth proportional to 18,712.49, 28,109.70 and 13,813.61 is: 20,750.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,712.49 : 28,109.70 = 13,813.61 : x
  2. Step 2: Convert to fraction form
    18,712.49/28,109.70 = 13,813.61/x
  3. Step 3: Cross multiply
    18,712.49x = 28,109.70 × 13,813.61
  4. Step 4: Simplify right side
    18,712.49x = 388,296,292.47
  5. Step 5: Solve for x
    x = 388,296,292.47/18,712.49
  6. Step 6: Final answer
    x = 20,750.65

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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.