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Finding the Fourth Proportional to 19,353.40, 28,986.90 and 15,897.40

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Solution

The fourth proportional to 19,353.40, 28,986.90 and 15,897.40 is: 23,810.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,353.40 : 28,986.90 = 15,897.40 : x
  2. Step 2: Convert to fraction form
    19,353.40/28,986.90 = 15,897.40/x
  3. Step 3: Cross multiply
    19,353.40x = 28,986.90 × 15,897.40
  4. Step 4: Simplify right side
    19,353.40x = 460,816,344.06
  5. Step 5: Solve for x
    x = 460,816,344.06/19,353.40
  6. Step 6: Final answer
    x = 23,810.61

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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.