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Finding the Fourth Proportional to 25,611.75, 38,418.03 and 7,143.75

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Solution

The fourth proportional to 25,611.75, 38,418.03 and 7,143.75 is: 10,715.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,611.75 : 38,418.03 = 7,143.75 : x
  2. Step 2: Convert to fraction form
    25,611.75/38,418.03 = 7,143.75/x
  3. Step 3: Cross multiply
    25,611.75x = 38,418.03 × 7,143.75
  4. Step 4: Simplify right side
    25,611.75x = 274,448,801.81
  5. Step 5: Solve for x
    x = 274,448,801.81/25,611.75
  6. Step 6: Final answer
    x = 10,715.74

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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.