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Finding the Fourth Proportional to 25,124.96, 37,687.80 and 11,978.72

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Solution

The fourth proportional to 25,124.96, 37,687.80 and 11,978.72 is: 17,968.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,124.96 : 37,687.80 = 11,978.72 : x
  2. Step 2: Convert to fraction form
    25,124.96/37,687.80 = 11,978.72/x
  3. Step 3: Cross multiply
    25,124.96x = 37,687.80 × 11,978.72
  4. Step 4: Simplify right side
    25,124.96x = 451,451,603.62
  5. Step 5: Solve for x
    x = 451,451,603.62/25,124.96
  6. Step 6: Final answer
    x = 17,968.25

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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.