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Finding the Fourth Proportional to 19,859.61, 27,407.01 and 11,900.30

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Solution

The fourth proportional to 19,859.61, 27,407.01 and 11,900.30 is: 16,422.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,859.61 : 27,407.01 = 11,900.30 : x
  2. Step 2: Convert to fraction form
    19,859.61/27,407.01 = 11,900.30/x
  3. Step 3: Cross multiply
    19,859.61x = 27,407.01 × 11,900.30
  4. Step 4: Simplify right side
    19,859.61x = 326,151,504.07
  5. Step 5: Solve for x
    x = 326,151,504.07/19,859.61
  6. Step 6: Final answer
    x = 16,422.86

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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.