Home / 5,319.47-7,979.56-1,621.72

Finding the Fourth Proportional to 5,319.47, 7,979.56 and 1,621.72

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Solution

The fourth proportional to 5,319.47, 7,979.56 and 1,621.72 is: 2,432.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,319.47 : 7,979.56 = 1,621.72 : x
  2. Step 2: Convert to fraction form
    5,319.47/7,979.56 = 1,621.72/x
  3. Step 3: Cross multiply
    5,319.47x = 7,979.56 × 1,621.72
  4. Step 4: Simplify right side
    5,319.47x = 12,940,627.09
  5. Step 5: Solve for x
    x = 12,940,627.09/5,319.47
  6. Step 6: Final answer
    x = 2,432.69

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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.