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Finding the Fourth Proportional to 25,215.30, 37,818.90 and 7,681.05

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Solution

The fourth proportional to 25,215.30, 37,818.90 and 7,681.05 is: 11,520.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,215.30 : 37,818.90 = 7,681.05 : x
  2. Step 2: Convert to fraction form
    25,215.30/37,818.90 = 7,681.05/x
  3. Step 3: Cross multiply
    25,215.30x = 37,818.90 × 7,681.05
  4. Step 4: Simplify right side
    25,215.30x = 290,488,861.85
  5. Step 5: Solve for x
    x = 290,488,861.85/25,215.30
  6. Step 6: Final answer
    x = 11,520.34

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.