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Finding the Fourth Proportional to 19,228.70, 28,843.05 and 11,809.10

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Solution

The fourth proportional to 19,228.70, 28,843.05 and 11,809.10 is: 17,713.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,228.70 : 28,843.05 = 11,809.10 : x
  2. Step 2: Convert to fraction form
    19,228.70/28,843.05 = 11,809.10/x
  3. Step 3: Cross multiply
    19,228.70x = 28,843.05 × 11,809.10
  4. Step 4: Simplify right side
    19,228.70x = 340,610,461.76
  5. Step 5: Solve for x
    x = 340,610,461.76/19,228.70
  6. Step 6: Final answer
    x = 17,713.65

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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.