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Finding the Fourth Proportional to 30,356.79, 41,911.88 and 19,606.50

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Solution

The fourth proportional to 30,356.79, 41,911.88 and 19,606.50 is: 27,069.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,356.79 : 41,911.88 = 19,606.50 : x
  2. Step 2: Convert to fraction form
    30,356.79/41,911.88 = 19,606.50/x
  3. Step 3: Cross multiply
    30,356.79x = 41,911.88 × 19,606.50
  4. Step 4: Simplify right side
    30,356.79x = 821,745,177.19
  5. Step 5: Solve for x
    x = 821,745,177.19/30,356.79
  6. Step 6: Final answer
    x = 27,069.57

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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.