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Finding the Fourth Proportional to 3,807.48, 5,253.71 and 2,128.60

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Solution

The fourth proportional to 3,807.48, 5,253.71 and 2,128.60 is: 2,937.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,807.48 : 5,253.71 = 2,128.60 : x
  2. Step 2: Convert to fraction form
    3,807.48/5,253.71 = 2,128.60/x
  3. Step 3: Cross multiply
    3,807.48x = 5,253.71 × 2,128.60
  4. Step 4: Simplify right side
    3,807.48x = 11,183,047.11
  5. Step 5: Solve for x
    x = 11,183,047.11/3,807.48
  6. Step 6: Final answer
    x = 2,937.13

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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.