Home / 21,147.30-29,182.50-12,195.18

Finding the Fourth Proportional to 21,147.30, 29,182.50 and 12,195.18

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Solution

The fourth proportional to 21,147.30, 29,182.50 and 12,195.18 is: 16,828.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,147.30 : 29,182.50 = 12,195.18 : x
  2. Step 2: Convert to fraction form
    21,147.30/29,182.50 = 12,195.18/x
  3. Step 3: Cross multiply
    21,147.30x = 29,182.50 × 12,195.18
  4. Step 4: Simplify right side
    21,147.30x = 355,885,840.35
  5. Step 5: Solve for x
    x = 355,885,840.35/21,147.30
  6. Step 6: Final answer
    x = 16,828.90

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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.