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Finding the Fourth Proportional to 12,810.20, 19,215.30 and 10,623.20

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Solution

The fourth proportional to 12,810.20, 19,215.30 and 10,623.20 is: 15,934.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,810.20 : 19,215.30 = 10,623.20 : x
  2. Step 2: Convert to fraction form
    12,810.20/19,215.30 = 10,623.20/x
  3. Step 3: Cross multiply
    12,810.20x = 19,215.30 × 10,623.20
  4. Step 4: Simplify right side
    12,810.20x = 204,127,974.96
  5. Step 5: Solve for x
    x = 204,127,974.96/12,810.20
  6. Step 6: Final answer
    x = 15,934.80

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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.