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Finding the Fourth Proportional to 18,528.94, 27,784.50 and 8,659.90

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Solution

The fourth proportional to 18,528.94, 27,784.50 and 8,659.90 is: 12,985.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,528.94 : 27,784.50 = 8,659.90 : x
  2. Step 2: Convert to fraction form
    18,528.94/27,784.50 = 8,659.90/x
  3. Step 3: Cross multiply
    18,528.94x = 27,784.50 × 8,659.90
  4. Step 4: Simplify right side
    18,528.94x = 240,610,991.55
  5. Step 5: Solve for x
    x = 240,610,991.55/18,528.94
  6. Step 6: Final answer
    x = 12,985.69

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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.