Home / 7,719.64-11,579.46-5,421.40

Finding the Fourth Proportional to 7,719.64, 11,579.46 and 5,421.40

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Solution

The fourth proportional to 7,719.64, 11,579.46 and 5,421.40 is: 8,132.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,719.64 : 11,579.46 = 5,421.40 : x
  2. Step 2: Convert to fraction form
    7,719.64/11,579.46 = 5,421.40/x
  3. Step 3: Cross multiply
    7,719.64x = 11,579.46 × 5,421.40
  4. Step 4: Simplify right side
    7,719.64x = 62,776,884.44
  5. Step 5: Solve for x
    x = 62,776,884.44/7,719.64
  6. Step 6: Final answer
    x = 8,132.10

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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.