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Finding the Fourth Proportional to 30,470.72, 42,050.21 and 17,040.51

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Solution

The fourth proportional to 30,470.72, 42,050.21 and 17,040.51 is: 23,516.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,470.72 : 42,050.21 = 17,040.51 : x
  2. Step 2: Convert to fraction form
    30,470.72/42,050.21 = 17,040.51/x
  3. Step 3: Cross multiply
    30,470.72x = 42,050.21 × 17,040.51
  4. Step 4: Simplify right side
    30,470.72x = 716,556,938.80
  5. Step 5: Solve for x
    x = 716,556,938.80/30,470.72
  6. Step 6: Final answer
    x = 23,516.25

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.