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Finding the Fourth Proportional to 19,855.65, 29,777.50 and 8,005.62

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Solution

The fourth proportional to 19,855.65, 29,777.50 and 8,005.62 is: 12,006.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,855.65 : 29,777.50 = 8,005.62 : x
  2. Step 2: Convert to fraction form
    19,855.65/29,777.50 = 8,005.62/x
  3. Step 3: Cross multiply
    19,855.65x = 29,777.50 × 8,005.62
  4. Step 4: Simplify right side
    19,855.65x = 238,387,349.55
  5. Step 5: Solve for x
    x = 238,387,349.55/19,855.65
  6. Step 6: Final answer
    x = 12,006.02

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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.