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Finding the Fourth Proportional to 12,810.20, 19,215.30 and 10,841.90

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Solution

The fourth proportional to 12,810.20, 19,215.30 and 10,841.90 is: 16,262.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,810.20 : 19,215.30 = 10,841.90 : x
  2. Step 2: Convert to fraction form
    12,810.20/19,215.30 = 10,841.90/x
  3. Step 3: Cross multiply
    12,810.20x = 19,215.30 × 10,841.90
  4. Step 4: Simplify right side
    12,810.20x = 208,330,361.07
  5. Step 5: Solve for x
    x = 208,330,361.07/12,810.20
  6. Step 6: Final answer
    x = 16,262.85

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.