Home / 21,085.92-31,667.76-16,731.36

Finding the Fourth Proportional to 21,085.92, 31,667.76 and 16,731.36

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Solution

The fourth proportional to 21,085.92, 31,667.76 and 16,731.36 is: 25,127.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,085.92 : 31,667.76 = 16,731.36 : x
  2. Step 2: Convert to fraction form
    21,085.92/31,667.76 = 16,731.36/x
  3. Step 3: Cross multiply
    21,085.92x = 31,667.76 × 16,731.36
  4. Step 4: Simplify right side
    21,085.92x = 529,844,692.95
  5. Step 5: Solve for x
    x = 529,844,692.95/21,085.92
  6. Step 6: Final answer
    x = 25,127.89

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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.