Home / 21,108.72-31,652.28-11,253.36

Finding the Fourth Proportional to 21,108.72, 31,652.28 and 11,253.36

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Solution

The fourth proportional to 21,108.72, 31,652.28 and 11,253.36 is: 16,874.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,108.72 : 31,652.28 = 11,253.36 : x
  2. Step 2: Convert to fraction form
    21,108.72/31,652.28 = 11,253.36/x
  3. Step 3: Cross multiply
    21,108.72x = 31,652.28 × 11,253.36
  4. Step 4: Simplify right side
    21,108.72x = 356,194,501.66
  5. Step 5: Solve for x
    x = 356,194,501.66/21,108.72
  6. Step 6: Final answer
    x = 16,874.28

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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.