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Finding the Fourth Proportional to 18,752.31, 28,103.86 and 13,798.76

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Solution

The fourth proportional to 18,752.31, 28,103.86 and 13,798.76 is: 20,680.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,752.31 : 28,103.86 = 13,798.76 : x
  2. Step 2: Convert to fraction form
    18,752.31/28,103.86 = 13,798.76/x
  3. Step 3: Cross multiply
    18,752.31x = 28,103.86 × 13,798.76
  4. Step 4: Simplify right side
    18,752.31x = 387,798,295.94
  5. Step 5: Solve for x
    x = 387,798,295.94/18,752.31
  6. Step 6: Final answer
    x = 20,680.03

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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.