Home / 21,276.45-29,364.09-12,205.11

Finding the Fourth Proportional to 21,276.45, 29,364.09 and 12,205.11

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Solution

The fourth proportional to 21,276.45, 29,364.09 and 12,205.11 is: 16,844.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,276.45 : 29,364.09 = 12,205.11 : x
  2. Step 2: Convert to fraction form
    21,276.45/29,364.09 = 12,205.11/x
  3. Step 3: Cross multiply
    21,276.45x = 29,364.09 × 12,205.11
  4. Step 4: Simplify right side
    21,276.45x = 358,391,948.50
  5. Step 5: Solve for x
    x = 358,391,948.50/21,276.45
  6. Step 6: Final answer
    x = 16,844.54

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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.