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Finding the Fourth Proportional to 38,124.41, 52,611.71 and 21,128.67

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Solution

The fourth proportional to 38,124.41, 52,611.71 and 21,128.67 is: 29,157.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,124.41 : 52,611.71 = 21,128.67 : x
  2. Step 2: Convert to fraction form
    38,124.41/52,611.71 = 21,128.67/x
  3. Step 3: Cross multiply
    38,124.41x = 52,611.71 × 21,128.67
  4. Step 4: Simplify right side
    38,124.41x = 1,111,615,353.08
  5. Step 5: Solve for x
    x = 1,111,615,353.08/38,124.41
  6. Step 6: Final answer
    x = 29,157.58

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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.