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Finding the Fourth Proportional to 19,767.80, 27,280.50 and 11,701.80

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Solution

The fourth proportional to 19,767.80, 27,280.50 and 11,701.80 is: 16,149.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,767.80 : 27,280.50 = 11,701.80 : x
  2. Step 2: Convert to fraction form
    19,767.80/27,280.50 = 11,701.80/x
  3. Step 3: Cross multiply
    19,767.80x = 27,280.50 × 11,701.80
  4. Step 4: Simplify right side
    19,767.80x = 319,230,954.90
  5. Step 5: Solve for x
    x = 319,230,954.90/19,767.80
  6. Step 6: Final answer
    x = 16,149.04

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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.