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Finding the Fourth Proportional to 28,955.70, 39,964.05 and 17,019.54

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Solution

The fourth proportional to 28,955.70, 39,964.05 and 17,019.54 is: 23,490.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,955.70 : 39,964.05 = 17,019.54 : x
  2. Step 2: Convert to fraction form
    28,955.70/39,964.05 = 17,019.54/x
  3. Step 3: Cross multiply
    28,955.70x = 39,964.05 × 17,019.54
  4. Step 4: Simplify right side
    28,955.70x = 680,169,747.54
  5. Step 5: Solve for x
    x = 680,169,747.54/28,955.70
  6. Step 6: Final answer
    x = 23,490.01

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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.