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Finding the Fourth Proportional to 25,639.53, 38,446.62 and 7,865.93

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Solution

The fourth proportional to 25,639.53, 38,446.62 and 7,865.93 is: 11,795.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,639.53 : 38,446.62 = 7,865.93 : x
  2. Step 2: Convert to fraction form
    25,639.53/38,446.62 = 7,865.93/x
  3. Step 3: Cross multiply
    25,639.53x = 38,446.62 × 7,865.93
  4. Step 4: Simplify right side
    25,639.53x = 302,418,517.77
  5. Step 5: Solve for x
    x = 302,418,517.77/25,639.53
  6. Step 6: Final answer
    x = 11,795.01

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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.