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Finding the Fourth Proportional to 25,866.68, 35,659.86 and 21,871.76

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Solution

The fourth proportional to 25,866.68, 35,659.86 and 21,871.76 is: 30,152.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,866.68 : 35,659.86 = 21,871.76 : x
  2. Step 2: Convert to fraction form
    25,866.68/35,659.86 = 21,871.76/x
  3. Step 3: Cross multiply
    25,866.68x = 35,659.86 × 21,871.76
  4. Step 4: Simplify right side
    25,866.68x = 779,943,899.55
  5. Step 5: Solve for x
    x = 779,943,899.55/25,866.68
  6. Step 6: Final answer
    x = 30,152.45

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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.