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Finding the Fourth Proportional to 28,117.30, 42,163.80 and 14,071.90

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Solution

The fourth proportional to 28,117.30, 42,163.80 and 14,071.90 is: 21,101.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,117.30 : 42,163.80 = 14,071.90 : x
  2. Step 2: Convert to fraction form
    28,117.30/42,163.80 = 14,071.90/x
  3. Step 3: Cross multiply
    28,117.30x = 42,163.80 × 14,071.90
  4. Step 4: Simplify right side
    28,117.30x = 593,324,777.22
  5. Step 5: Solve for x
    x = 593,324,777.22/28,117.30
  6. Step 6: Final answer
    x = 21,101.77

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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.