Home / 5,317.32-7,976.40-1,421.64

Finding the Fourth Proportional to 5,317.32, 7,976.40 and 1,421.64

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Solution

The fourth proportional to 5,317.32, 7,976.40 and 1,421.64 is: 2,132.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,317.32 : 7,976.40 = 1,421.64 : x
  2. Step 2: Convert to fraction form
    5,317.32/7,976.40 = 1,421.64/x
  3. Step 3: Cross multiply
    5,317.32x = 7,976.40 × 1,421.64
  4. Step 4: Simplify right side
    5,317.32x = 11,339,569.30
  5. Step 5: Solve for x
    x = 11,339,569.30/5,317.32
  6. Step 6: Final answer
    x = 2,132.57

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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.