Home / 5,417.15-8,128.72-2,643.84

Finding the Fourth Proportional to 5,417.15, 8,128.72 and 2,643.84

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Solution

The fourth proportional to 5,417.15, 8,128.72 and 2,643.84 is: 3,967.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,417.15 : 8,128.72 = 2,643.84 : x
  2. Step 2: Convert to fraction form
    5,417.15/8,128.72 = 2,643.84/x
  3. Step 3: Cross multiply
    5,417.15x = 8,128.72 × 2,643.84
  4. Step 4: Simplify right side
    5,417.15x = 21,491,038.64
  5. Step 5: Solve for x
    x = 21,491,038.64/5,417.15
  6. Step 6: Final answer
    x = 3,967.23

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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.