Home / 21,491.30-29,656.51-11,930.44

Finding the Fourth Proportional to 21,491.30, 29,656.51 and 11,930.44

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Solution

The fourth proportional to 21,491.30, 29,656.51 and 11,930.44 is: 16,463.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,491.30 : 29,656.51 = 11,930.44 : x
  2. Step 2: Convert to fraction form
    21,491.30/29,656.51 = 11,930.44/x
  3. Step 3: Cross multiply
    21,491.30x = 29,656.51 × 11,930.44
  4. Step 4: Simplify right side
    21,491.30x = 353,815,213.16
  5. Step 5: Solve for x
    x = 353,815,213.16/21,491.30
  6. Step 6: Final answer
    x = 16,463.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.