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Finding the Fourth Proportional to 19,509.88, 26,926.65 and 12,814.93

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Solution

The fourth proportional to 19,509.88, 26,926.65 and 12,814.93 is: 17,686.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,509.88 : 26,926.65 = 12,814.93 : x
  2. Step 2: Convert to fraction form
    19,509.88/26,926.65 = 12,814.93/x
  3. Step 3: Cross multiply
    19,509.88x = 26,926.65 × 12,814.93
  4. Step 4: Simplify right side
    19,509.88x = 345,063,134.88
  5. Step 5: Solve for x
    x = 345,063,134.88/19,509.88
  6. Step 6: Final answer
    x = 17,686.58

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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.