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Finding the Fourth Proportional to 19,710.68, 27,200.62 and 11,212.78

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Solution

The fourth proportional to 19,710.68, 27,200.62 and 11,212.78 is: 15,473.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,710.68 : 27,200.62 = 11,212.78 : x
  2. Step 2: Convert to fraction form
    19,710.68/27,200.62 = 11,212.78/x
  3. Step 3: Cross multiply
    19,710.68x = 27,200.62 × 11,212.78
  4. Step 4: Simplify right side
    19,710.68x = 304,994,513.94
  5. Step 5: Solve for x
    x = 304,994,513.94/19,710.68
  6. Step 6: Final answer
    x = 15,473.57

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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.