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Finding the Fourth Proportional to 18,681.63, 25,829.85 and 17,855.43

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Solution

The fourth proportional to 18,681.63, 25,829.85 and 17,855.43 is: 24,687.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,681.63 : 25,829.85 = 17,855.43 : x
  2. Step 2: Convert to fraction form
    18,681.63/25,829.85 = 17,855.43/x
  3. Step 3: Cross multiply
    18,681.63x = 25,829.85 × 17,855.43
  4. Step 4: Simplify right side
    18,681.63x = 461,203,078.59
  5. Step 5: Solve for x
    x = 461,203,078.59/18,681.63
  6. Step 6: Final answer
    x = 24,687.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.