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Finding the Fourth Proportional to 19,011.30, 28,488.81 and 16,935.30

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Solution

The fourth proportional to 19,011.30, 28,488.81 and 16,935.30 is: 25,377.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,011.30 : 28,488.81 = 16,935.30 : x
  2. Step 2: Convert to fraction form
    19,011.30/28,488.81 = 16,935.30/x
  3. Step 3: Cross multiply
    19,011.30x = 28,488.81 × 16,935.30
  4. Step 4: Simplify right side
    19,011.30x = 482,466,543.99
  5. Step 5: Solve for x
    x = 482,466,543.99/19,011.30
  6. Step 6: Final answer
    x = 25,377.88

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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.