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Finding the Fourth Proportional to 19,897.29, 29,830.95 and 17,156.25

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Solution

The fourth proportional to 19,897.29, 29,830.95 and 17,156.25 is: 25,721.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,897.29 : 29,830.95 = 17,156.25 : x
  2. Step 2: Convert to fraction form
    19,897.29/29,830.95 = 17,156.25/x
  3. Step 3: Cross multiply
    19,897.29x = 29,830.95 × 17,156.25
  4. Step 4: Simplify right side
    19,897.29x = 511,787,235.94
  5. Step 5: Solve for x
    x = 511,787,235.94/19,897.29
  6. Step 6: Final answer
    x = 25,721.45

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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.