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Finding the Fourth Proportional to 18,486.60, 27,701.55 and 13,784.55

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Solution

The fourth proportional to 18,486.60, 27,701.55 and 13,784.55 is: 20,655.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,486.60 : 27,701.55 = 13,784.55 : x
  2. Step 2: Convert to fraction form
    18,486.60/27,701.55 = 13,784.55/x
  3. Step 3: Cross multiply
    18,486.60x = 27,701.55 × 13,784.55
  4. Step 4: Simplify right side
    18,486.60x = 381,853,401.05
  5. Step 5: Solve for x
    x = 381,853,401.05/18,486.60
  6. Step 6: Final answer
    x = 20,655.69

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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.