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Finding the Fourth Proportional to 19,231.53, 28,795.15 and 9,978.09

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Solution

The fourth proportional to 19,231.53, 28,795.15 and 9,978.09 is: 14,940.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,231.53 : 28,795.15 = 9,978.09 : x
  2. Step 2: Convert to fraction form
    19,231.53/28,795.15 = 9,978.09/x
  3. Step 3: Cross multiply
    19,231.53x = 28,795.15 × 9,978.09
  4. Step 4: Simplify right side
    19,231.53x = 287,320,598.26
  5. Step 5: Solve for x
    x = 287,320,598.26/19,231.53
  6. Step 6: Final answer
    x = 14,940.08

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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.