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Finding the Fourth Proportional to 19,691.14, 29,539.65 and 7,039.93

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Solution

The fourth proportional to 19,691.14, 29,539.65 and 7,039.93 is: 10,560.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,691.14 : 29,539.65 = 7,039.93 : x
  2. Step 2: Convert to fraction form
    19,691.14/29,539.65 = 7,039.93/x
  3. Step 3: Cross multiply
    19,691.14x = 29,539.65 × 7,039.93
  4. Step 4: Simplify right side
    19,691.14x = 207,957,068.22
  5. Step 5: Solve for x
    x = 207,957,068.22/19,691.14
  6. Step 6: Final answer
    x = 10,560.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.