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Finding the Fourth Proportional to 21,668, 32,334.28 and 19,335.20

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Solution

The fourth proportional to 21,668, 32,334.28 and 19,335.20 is: 28,853.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,668 : 32,334.28 = 19,335.20 : x
  2. Step 2: Convert to fraction form
    21,668/32,334.28 = 19,335.20/x
  3. Step 3: Cross multiply
    21,668x = 32,334.28 × 19,335.20
  4. Step 4: Simplify right side
    21,668x = 625,189,770.66
  5. Step 5: Solve for x
    x = 625,189,770.66/21,668
  6. Step 6: Final answer
    x = 28,853.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.