Home / 21,761.36-30,033.10-12,811.08

Finding the Fourth Proportional to 21,761.36, 30,033.10 and 12,811.08

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Solution

The fourth proportional to 21,761.36, 30,033.10 and 12,811.08 is: 17,680.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,761.36 : 30,033.10 = 12,811.08 : x
  2. Step 2: Convert to fraction form
    21,761.36/30,033.10 = 12,811.08/x
  3. Step 3: Cross multiply
    21,761.36x = 30,033.10 × 12,811.08
  4. Step 4: Simplify right side
    21,761.36x = 384,756,446.75
  5. Step 5: Solve for x
    x = 384,756,446.75/21,761.36
  6. Step 6: Final answer
    x = 17,680.72

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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.