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Finding the Fourth Proportional to 18,761.42, 25,900.16 and 14,502.86

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Solution

The fourth proportional to 18,761.42, 25,900.16 and 14,502.86 is: 20,021.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,761.42 : 25,900.16 = 14,502.86 : x
  2. Step 2: Convert to fraction form
    18,761.42/25,900.16 = 14,502.86/x
  3. Step 3: Cross multiply
    18,761.42x = 25,900.16 × 14,502.86
  4. Step 4: Simplify right side
    18,761.42x = 375,626,394.46
  5. Step 5: Solve for x
    x = 375,626,394.46/18,761.42
  6. Step 6: Final answer
    x = 20,021.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.