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Finding the Fourth Proportional to 19,987.56, 29,964.60 and 12,573.63

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Solution

The fourth proportional to 19,987.56, 29,964.60 and 12,573.63 is: 18,849.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,987.56 : 29,964.60 = 12,573.63 : x
  2. Step 2: Convert to fraction form
    19,987.56/29,964.60 = 12,573.63/x
  3. Step 3: Cross multiply
    19,987.56x = 29,964.60 × 12,573.63
  4. Step 4: Simplify right side
    19,987.56x = 376,763,793.50
  5. Step 5: Solve for x
    x = 376,763,793.50/19,987.56
  6. Step 6: Final answer
    x = 18,849.91

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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.