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Finding the Fourth Proportional to 35,620.80, 53,421.60 and 10,660.80

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Solution

The fourth proportional to 35,620.80, 53,421.60 and 10,660.80 is: 15,988.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,620.80 : 53,421.60 = 10,660.80 : x
  2. Step 2: Convert to fraction form
    35,620.80/53,421.60 = 10,660.80/x
  3. Step 3: Cross multiply
    35,620.80x = 53,421.60 × 10,660.80
  4. Step 4: Simplify right side
    35,620.80x = 569,516,993.28
  5. Step 5: Solve for x
    x = 569,516,993.28/35,620.80
  6. Step 6: Final answer
    x = 15,988.33

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.