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Finding the Fourth Proportional to 19,987.08, 29,980.89 and 7,504.80

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Solution

The fourth proportional to 19,987.08, 29,980.89 and 7,504.80 is: 11,257.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,987.08 : 29,980.89 = 7,504.80 : x
  2. Step 2: Convert to fraction form
    19,987.08/29,980.89 = 7,504.80/x
  3. Step 3: Cross multiply
    19,987.08x = 29,980.89 × 7,504.80
  4. Step 4: Simplify right side
    19,987.08x = 225,000,583.27
  5. Step 5: Solve for x
    x = 225,000,583.27/19,987.08
  6. Step 6: Final answer
    x = 11,257.30

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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.