Home / 21,108.08-31,676.53-11,254.28

Finding the Fourth Proportional to 21,108.08, 31,676.53 and 11,254.28

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Solution

The fourth proportional to 21,108.08, 31,676.53 and 11,254.28 is: 16,889.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,108.08 : 31,676.53 = 11,254.28 : x
  2. Step 2: Convert to fraction form
    21,108.08/31,676.53 = 11,254.28/x
  3. Step 3: Cross multiply
    21,108.08x = 31,676.53 × 11,254.28
  4. Step 4: Simplify right side
    21,108.08x = 356,496,522.09
  5. Step 5: Solve for x
    x = 356,496,522.09/21,108.08
  6. Step 6: Final answer
    x = 16,889.10

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1.5x scale

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.