Home / 5,251.21-7,878.40-2,130.64

Finding the Fourth Proportional to 5,251.21, 7,878.40 and 2,130.64

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Solution

The fourth proportional to 5,251.21, 7,878.40 and 2,130.64 is: 3,196.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,251.21 : 7,878.40 = 2,130.64 : x
  2. Step 2: Convert to fraction form
    5,251.21/7,878.40 = 2,130.64/x
  3. Step 3: Cross multiply
    5,251.21x = 7,878.40 × 2,130.64
  4. Step 4: Simplify right side
    5,251.21x = 16,786,009.15
  5. Step 5: Solve for x
    x = 16,786,009.15/5,251.21
  6. Step 6: Final answer
    x = 3,196.60

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Why These Related Problems?

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