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Finding the Fourth Proportional to 19,860.38, 29,783.96 and 8,011.09

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Solution

The fourth proportional to 19,860.38, 29,783.96 and 8,011.09 is: 12,013.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,860.38 : 29,783.96 = 8,011.09 : x
  2. Step 2: Convert to fraction form
    19,860.38/29,783.96 = 8,011.09/x
  3. Step 3: Cross multiply
    19,860.38x = 29,783.96 × 8,011.09
  4. Step 4: Simplify right side
    19,860.38x = 238,601,984.12
  5. Step 5: Solve for x
    x = 238,601,984.12/19,860.38
  6. Step 6: Final answer
    x = 12,013.97

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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.