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Finding the Fourth Proportional to 13,727.80, 20,610.90 and 8,543.80

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Solution

The fourth proportional to 13,727.80, 20,610.90 and 8,543.80 is: 12,827.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,727.80 : 20,610.90 = 8,543.80 : x
  2. Step 2: Convert to fraction form
    13,727.80/20,610.90 = 8,543.80/x
  3. Step 3: Cross multiply
    13,727.80x = 20,610.90 × 8,543.80
  4. Step 4: Simplify right side
    13,727.80x = 176,095,407.42
  5. Step 5: Solve for x
    x = 176,095,407.42/13,727.80
  6. Step 6: Final answer
    x = 12,827.65

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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.