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Finding the Fourth Proportional to 19,185.78, 26,477.16 and 10,687.88

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Solution

The fourth proportional to 19,185.78, 26,477.16 and 10,687.88 is: 14,749.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,185.78 : 26,477.16 = 10,687.88 : x
  2. Step 2: Convert to fraction form
    19,185.78/26,477.16 = 10,687.88/x
  3. Step 3: Cross multiply
    19,185.78x = 26,477.16 × 10,687.88
  4. Step 4: Simplify right side
    19,185.78x = 282,984,708.82
  5. Step 5: Solve for x
    x = 282,984,708.82/19,185.78
  6. Step 6: Final answer
    x = 14,749.71

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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.