Home / 21,321.08-29,423.20-11,761.30

Finding the Fourth Proportional to 21,321.08, 29,423.20 and 11,761.30

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Solution

The fourth proportional to 21,321.08, 29,423.20 and 11,761.30 is: 16,230.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,321.08 : 29,423.20 = 11,761.30 : x
  2. Step 2: Convert to fraction form
    21,321.08/29,423.20 = 11,761.30/x
  3. Step 3: Cross multiply
    21,321.08x = 29,423.20 × 11,761.30
  4. Step 4: Simplify right side
    21,321.08x = 346,054,979.20
  5. Step 5: Solve for x
    x = 346,054,979.20/21,321.08
  6. Step 6: Final answer
    x = 16,230.65

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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.