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Finding the Fourth Proportional to 67,671.48, 101,516.94 and 20,928

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Solution

The fourth proportional to 67,671.48, 101,516.94 and 20,928 is: 31,395.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,671.48 : 101,516.94 = 20,928 : x
  2. Step 2: Convert to fraction form
    67,671.48/101,516.94 = 20,928/x
  3. Step 3: Cross multiply
    67,671.48x = 101,516.94 × 20,928
  4. Step 4: Simplify right side
    67,671.48x = 2,124,546,520.32
  5. Step 5: Solve for x
    x = 2,124,546,520.32/67,671.48
  6. Step 6: Final answer
    x = 31,395.01

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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.