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Finding the Fourth Proportional to 18,611.88, 25,689.42 and 11,534.46

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Solution

The fourth proportional to 18,611.88, 25,689.42 and 11,534.46 is: 15,920.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,611.88 : 25,689.42 = 11,534.46 : x
  2. Step 2: Convert to fraction form
    18,611.88/25,689.42 = 11,534.46/x
  3. Step 3: Cross multiply
    18,611.88x = 25,689.42 × 11,534.46
  4. Step 4: Simplify right side
    18,611.88x = 296,313,587.41
  5. Step 5: Solve for x
    x = 296,313,587.41/18,611.88
  6. Step 6: Final answer
    x = 15,920.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.