Home / 21,221.08-29,285.72-12,267.79

Finding the Fourth Proportional to 21,221.08, 29,285.72 and 12,267.79

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Solution

The fourth proportional to 21,221.08, 29,285.72 and 12,267.79 is: 16,929.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,221.08 : 29,285.72 = 12,267.79 : x
  2. Step 2: Convert to fraction form
    21,221.08/29,285.72 = 12,267.79/x
  3. Step 3: Cross multiply
    21,221.08x = 29,285.72 × 12,267.79
  4. Step 4: Simplify right side
    21,221.08x = 359,270,974.41
  5. Step 5: Solve for x
    x = 359,270,974.41/21,221.08
  6. Step 6: Final answer
    x = 16,929.91

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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.