Home / 21,084.10-31,616.90-11,221.04

Finding the Fourth Proportional to 21,084.10, 31,616.90 and 11,221.04

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Solution

The fourth proportional to 21,084.10, 31,616.90 and 11,221.04 is: 16,826.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,084.10 : 31,616.90 = 11,221.04 : x
  2. Step 2: Convert to fraction form
    21,084.10/31,616.90 = 11,221.04/x
  3. Step 3: Cross multiply
    21,084.10x = 31,616.90 × 11,221.04
  4. Step 4: Simplify right side
    21,084.10x = 354,774,499.58
  5. Step 5: Solve for x
    x = 354,774,499.58/21,084.10
  6. Step 6: Final answer
    x = 16,826.64

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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.