Home / 18,747.45-28,134.81-13,830.30

Finding the Fourth Proportional to 18,747.45, 28,134.81 and 13,830.30

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Solution

The fourth proportional to 18,747.45, 28,134.81 and 13,830.30 is: 20,755.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,747.45 : 28,134.81 = 13,830.30 : x
  2. Step 2: Convert to fraction form
    18,747.45/28,134.81 = 13,830.30/x
  3. Step 3: Cross multiply
    18,747.45x = 28,134.81 × 13,830.30
  4. Step 4: Simplify right side
    18,747.45x = 389,112,862.74
  5. Step 5: Solve for x
    x = 389,112,862.74/18,747.45
  6. Step 6: Final answer
    x = 20,755.51

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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.