Home / 21,580.44-29,780.58-12,148.80

Finding the Fourth Proportional to 21,580.44, 29,780.58 and 12,148.80

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Solution

The fourth proportional to 21,580.44, 29,780.58 and 12,148.80 is: 16,765.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,580.44 : 29,780.58 = 12,148.80 : x
  2. Step 2: Convert to fraction form
    21,580.44/29,780.58 = 12,148.80/x
  3. Step 3: Cross multiply
    21,580.44x = 29,780.58 × 12,148.80
  4. Step 4: Simplify right side
    21,580.44x = 361,798,310.30
  5. Step 5: Solve for x
    x = 361,798,310.30/21,580.44
  6. Step 6: Final answer
    x = 16,765.10

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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.