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Finding the Fourth Proportional to 19,759.55, 29,639.93 and 7,274.21

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Solution

The fourth proportional to 19,759.55, 29,639.93 and 7,274.21 is: 10,911.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,759.55 : 29,639.93 = 7,274.21 : x
  2. Step 2: Convert to fraction form
    19,759.55/29,639.93 = 7,274.21/x
  3. Step 3: Cross multiply
    19,759.55x = 29,639.93 × 7,274.21
  4. Step 4: Simplify right side
    19,759.55x = 215,606,890.63
  5. Step 5: Solve for x
    x = 215,606,890.63/19,759.55
  6. Step 6: Final answer
    x = 10,911.53

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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.