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Finding the Fourth Proportional to 13,798.63, 20,698.71 and 3,937.15

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Solution

The fourth proportional to 13,798.63, 20,698.71 and 3,937.15 is: 5,905.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,798.63 : 20,698.71 = 3,937.15 : x
  2. Step 2: Convert to fraction form
    13,798.63/20,698.71 = 3,937.15/x
  3. Step 3: Cross multiply
    13,798.63x = 20,698.71 × 3,937.15
  4. Step 4: Simplify right side
    13,798.63x = 81,493,926.08
  5. Step 5: Solve for x
    x = 81,493,926.08/13,798.63
  6. Step 6: Final answer
    x = 5,905.94

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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.