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Finding the Fourth Proportional to 19,978.38, 27,555.93 and 14,011.38

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Solution

The fourth proportional to 19,978.38, 27,555.93 and 14,011.38 is: 19,325.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,978.38 : 27,555.93 = 14,011.38 : x
  2. Step 2: Convert to fraction form
    19,978.38/27,555.93 = 14,011.38/x
  3. Step 3: Cross multiply
    19,978.38x = 27,555.93 × 14,011.38
  4. Step 4: Simplify right side
    19,978.38x = 386,096,606.48
  5. Step 5: Solve for x
    x = 386,096,606.48/19,978.38
  6. Step 6: Final answer
    x = 19,325.72

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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.